blitzluft valves

how do you wire these valves?

i understand how to wire them.. but when i unscrew the wire protecter there is a piece with a little LED and i dont know what that is for but it comes out and there is the prongs underneath. what im thinking is that u unscrew the little screws on the piece with the LED and pust the wire through that then screw it back in... any more help is appreciated

Mine are wired into the connector block thing, polarity doesnt matter, just use the two vertical pins... use the set screws and put your wire into it, then tighten it down, its nice not to have to use connectors or anything... let me know how you like those valves, i havent had a problem with mine at all so far, but i have only put about 300 miles on my truck so far