4 elevons with crow

I’m attempting to setup one of my gliders with Ardupilot. It is a plank with 4 elevons (2 per side) that I use in crow mode for landing. Can someone point me to some guidance for setting this up? I have 4 outputs assigned to elevons, but don’t see a way that I can interact with them in crow mode. Thanks in advance.

I found the documentation here: