Wiring?

Not sure on the ECU, but I do remember seeing the 5 pin connector,so when I go in Monday I will take along my OHM meter and check pin 5. I also have a spare 4 wire ballast to take along. I do remember that the aftermarket harness has only 2 wires going to the 2 wire ballast that he has on the car now, with one of those wires having 2 wires going into one of the terminals. I know this type of kit has probably been used hundreds of times on new builds/street rods ect using Mopar power so the harness shouldn't be an issue. I'm just trying to go through someone elses deal and try to figure it all out for him. I'm still not sure what the white wire in his harness goes. It's stamped exciter and is now wired to another wire going to the ballast, but the aftermarket schematic shows it going to one side of the voltage reg.. The aftermarket schematic shows one field wire coming from the alt going to the votage reg and the other field wire going to this exciter wire which I guess makes sense. That exciter wire then goes into the wire bundle and terminates in the fuse block. At this point my main objectives is getting good ignition and the charge system figure out. Crank side seems ok, because it does crank.