As far as I can tell:
Get motion controller Thumbstick X -> range -1, 1 Trackpad X axis
Get motion controller Thumbstick Y -> range -1, 1 Trackpad Y axis
Get motion controller Triggeraxis -> range -1, 1 Trigger
Event: MotionController FaceButton1 -> Trackpad click up
Event: MotionController FaceButton2 -> Trackpad click right
Event: MotionController FaceButton3 -> Trackpad click down
Event: MotionController FaceButton4 -> Trackpad click left
Event: MotionController Trigger -> Trigger
Event: MotionController Grip1 -> Grip Trigger
Event: MotionController Shoulder -> Home Button
I wasn’t able to figure out the thumbstick.
Edit:
added trigger event