I put the flap switch in mine, but you could easily do similar with a momentary Otto. For that, I'd probably just epoxy it in.
I drilled a wiring escape hole and just tied it to the arm with a sleeved loop that gives plenty of movement.
N164WM RV-6A Slider/O-360/FP Sold 4/2022
N184WM (RV-8) Final stages. Titan IOX-370
N184P reserved (RV-8QB) Empennage