Process for adding feeds is undocumented

I have found no documentation of the proces for adding rss or atom feeds to the database so the leech module can do its thing. Nothing in the README gives a clue. Nothing I can discern in the user interface seems willing to give up the secret. I've been testing this on both 4.7 and 5.1 installations and running into exactly the same issues. The install proceeds as described in the README, but then I get it installed and don't know what to do with it expect check its empty results page or review its configuration again.