What layout for 3 central buttons of XBox One gamepad?

I’ve figured out what settings to use for all axes and almost any buttons on the gamepad, except these 3 buttons:

Not everything is the same as described in this topic.
I don’t know what to write in ‘positive button’ field.

3079933--231835--3buttons.png

That topic is about android - is that what you’re asking about?

For desktop platforms: http://wiki.unity3d.com/index.php?title=Xbox360Controller

The link you gave - I’ve seen that and that doesn’t fit very well either. And I noticed that what fits Linux also fits Android.