Accessing Quest 2 button presses in Editor VR mode

I’m trying to set up a custom control to use while in the Editor’s VR mode and VP scouting tools. I was hoping to be able to attach my custom Blueprint to the Quest 2’s unused Left Controller Menu button, only I cannot find how to access it. I’ve gone digging through the VP_ScoutingSubsystem and other related systems and I just can’t find it how to access any of the VR controller’s buttons anywhere.

Does anyone know how I could go about getting this to work?