mapping buttons on Oculus rift s 4.24

hi all - I am trying to map the buttons on the motion controllers of the Rift S, and I am getting nowhere - I am using the same approach I normally use when mapping to a key on the keyboard, but when I do this for the motion controllers, say to turn on a light in VR, when I go into VR mode, the light is just flickering really fast and the buttons do nothing. does anyone know if the proper way to do this type of thing is documented somewhere? like a screen shot of a blueprint for toggling a light on and off would be great.

thanks in advance,
john