If I install this plugin, and attempt to use it with a GitHub Enterprise server (via New Item > Multibranch pipeline > Branch Sources > GitHub), there isn't any documentation.
I discovered that there is a "API endpoint" dropdown, but it just says "GitHub" and has no documentation.
If I go to Manage Jenkins > Manage System, I see two different places to configure GitHub servers — one comes from the GitHub plugin, which is a dependency. This is directly followed by a duplicate, but less-detailed configuration UI, provided by this plugin.
Ideally, there should be one single, documented place to enter the required information.