[geunther]

Yes, you will likely never need them unless you like the factory original thing like some of us weirdos. The solenoid got its ground from a couple of different places, one was the temp sender on passenger side (cold temp situation), one was from the transmission (high gear situation). Those wires should be fairly easy to find as you already found most of them. Under the dash there will be a delay relay which supplies to the power side of the solenoid after I think 20 seconds. I can show you a pic of the timing relay as well as transmission ground wire if need be. The wires them selves will be taped together with some of the cowl top wires.