Twitter module: how to manage separate global accounts for each domain?

I created yesterday the file domain_conf.inc to solve the Google Analytics workaround with Domain access, and it works fine.
I tried then to do "the same" (i'm a newbie) for twitter module, below the code used, but I can't see any twitter module related fields to setup on the domain settings. (I can still see the GAnalytics one).

Any help much appreciated.
Pedro

/**
* Implements hook_domainconf() to add the google analytics account number per domain.
*/

function googleanalytics_domainconf() {
  $form['googleanalytics'] = array(
    '#type' => 'fieldset',
    '#title' => t('Google Analytics settings'),
    '#collapsible' => TRUE,
    '#collapsed' => FALSE,
  );

  $form['googleanalytics']['googleanalytics_account'] = array(
    '#type' => 'textfield',
    '#title' => t('Google Analytics account number'),
    '#default_value' => variable_get('google_analytics', 'UA-'),
    '#size' => 15,
    '#maxlength' => 20,
    '#required' => TRUE,
    '#description' => t('The account number is unique to the websites domain. Click the <strong>Edit</strong> link in your Google Analytics account next to the appropriate profile on the <strong>Analytics Settings</strong> page, then select <strong>Check Status</strong> at the top-right of the table to find the account number (UA-xxxx-x) of your site. You can obtain a user account from the <a href="@url">Google Analytics</a> website.', array('@url' => 'http://www.google.com/analytics/')),
  );
  return $form;
}
/**
* Implements hook_domainconf() to add the setup of a global twitter account per domain.
*/

function twitterglobalaccount_domainconf() {
  $form['global_account'] = array(
    '#type' => 'fieldset',
    '#title' => t('Global Twitter account'),
    '#description' => t('A site-wide Twitter account to use as the default when tweets are posted. This is useful for single-user blogs or sites where many users post to a single shared Twitter account.'),
  );

  $form['global_account']['twitter_global_name'] = array(
    '#type' => 'textfield',
    '#title' => t('Twitter user name'),
    '#default_value' => variable_get('twitter_global_name', NULL),
  );
  
  $form['global_account']['twitter_global_password'] = array(
    '#type' => 'password',
    '#title' => t('Password'),
    '#description' => t("If your Twitter account is protected, or you wish to post to Twitter from Drupal, you must enter the Twitter account's password."),
    '#default_value' => variable_get('twitter_global_password', NULL),
  );

  $form['posting']['twitter_default_format'] = array(
    '#type' => 'textfield',
    '#title' => t('Default format string'),
    '#maxlength' => 140,
    '#description' => t('The given text will be posted to twitter.com. You can use !url, !url-alias, !tinyurl, !title, and !user as replacement text.'),
    '#default_value' => variable_get('twitter_default_format', 'New post: !title !tinyurl'),
  );

  return $form;
}

Thanks agentrickard
It works fine, just for the record I copy the final code with some minor changes. Posted also on #611698: Twitter module compatible with domain access ?

/**
* Implements hook_domainconf() to add the google analytics account number per domain.
*/

function googleanalytics_domainconf() {
  $form['googleanalytics'] = array(
    '#type' => 'fieldset',
    '#title' => t('Google Analytics settings'),
    '#collapsible' => TRUE,
    '#collapsed' => FALSE,
  );

  $form['googleanalytics']['googleanalytics_account'] = array(
    '#type' => 'textfield',
    '#title' => t('Google Analytics account number'),
    '#default_value' => variable_get('google_analytics', 'UA-'),
    '#size' => 15,
    '#maxlength' => 20,
    '#required' => TRUE,
    '#description' => t('The account number is unique to the websites domain. Click the <strong>Edit</strong> link in your Google Analytics account next to the appropriate profile on the <strong>Analytics Settings</strong> page, then select <strong>Check Status</strong> at the top-right of the table to find the account number (UA-xxxx-x) of your site. You can obtain a user account from the <a href="@url">Google Analytics</a> website.', array('@url' => 'http://www.google.com/analytics/')),
  );
  return $form;
}
/**
* Implements hook_domainconf() to add the setup of a global twitter account per domain.
*/

function twitter_domainconf() {
  $form['twitter'] = array(
    '#type' => 'fieldset',
    '#title' => t('Twitter Global Account'),
    '#description' => t('A site-wide Twitter account to use as the default when tweets are posted. This is useful for single-user blogs or sites where many users post to a single shared Twitter account.'),
    '#collapsible' => TRUE,
    '#collapsed' => FALSE,

  );

  $form['twitter']['twitter_global_name'] = array(
    '#type' => 'textfield',
    '#title' => t('Twitter Domain User name'),
    '#default_value' => variable_get('twitter_global_name', NULL),
  );
  
  $form['twitter']['twitter_global_password'] = array(
    '#type' => 'password',
    '#title' => t('Password'),
    '#description' => t("If your Twitter account is protected, or you wish to post to Twitter from Drupal, you must enter the Twitter account's password."),
    '#default_value' => variable_get('twitter_global_password', NULL),
  );

  $form['twitter']['twitter_default_format'] = array(
    '#type' => 'textfield',
    '#title' => t('Default format string'),
    '#maxlength' => 140,
    '#description' => t('The given text will be posted to twitter.com. You can use !url, !url-alias, !tinyurl, !title, and !user as replacement text.'),
    '#default_value' => variable_get('twitter_default_format', 'New post: !title !tinyurl'),
  );

  return $form;
}