tvOS Controller Mapping

How do we map the tvOS controller buttons into the UE4 project?

Reviving this here. There doesn’t seem to be documentation or good ways to figure out the controller mappings for tvOS. There’s now multiple tvOS controllers, and no real way to get the list of buttons associated with every controller, so we have a standing chance to make it work.

Also, any forum message on tvOS controllers is pretty much cricket-town. Any authoritative list that works everywhere?