So I built a custom truck and had buddy of mine do wiring on it and he hacked it all up. So there are like 4 wires he cut on the in cab harness and I can’t find any where they go, but I noticed the brown clip in the back of fuse panel is missing now. Idk if it was ever plugged in but can someone tell me if it is needed 

 

thank you

I believe you need to be a member and then you can download service manual that has wiring diagram