The brown harness is for the swirl valves, so you can ignore that one. But yeah, looking in from the front of the car, I ran the left pin to my positive battery terminal and connected the right pin to the yellow wire from my Summit rpm switch. What year is your car? I definitely recommend using the TAM screw for the signal. On my '95, I was able to get a wire run from that screw in like 15 minutes. Sure beats cutting into my ecu harness!
