I'm pretty sure thats the one that requires you to cut the main feed for the coil packs and split it in order to run it through the tach adaptor, i can't remember the color but you can catch it near the passengers side firewall running into the main harness, there will only be two wires per each pack, so check and see which one is concurrent to all packs and then look for that one in the main harness, like i said u have to cut it and run the one side through the tach adaptor then reconnect it out the other side. anyways hope this helps.