I'm using an '00 donor harness. I've plugged everything in on the engine harness but I have one loose connector and I can't figure out what it is. Tied into the same loom as the driver's side O-2 connectors there's a ground wire and a two wire female connector coming out of the loom about 4" above the O-2 connectors. The two wire connector is green/white stripe and black. It fits into the coolant temperature sensor but I know that's not where it belongs. I've looked through all the engine control connectors in the Vette manual and can't find it nor can I find a mate on the engine. What is this connector for?