[jimbo493]

We use these exact limit switches, you need to use 18 AWG wire, since it fits in both these and and the headers for the roboRio. you put the wire thru 1 and 2 or 3 and 4, cut it flush with the surface, insert the white thing with the pin numbers into the switch, with the rubber strain relief on, and tighten the nut as far as it will go.