I located the soft start unlocking wire that was already installed on the magneto plugs. The other end of this wire connects to the starter relay and start button.
I also located the alternator wires and a two-wire plug that I believe to be for the tachometer. I'll need to check the manual to verify connections.
I also have a plug with two wires that I think comes with the voltage regulator. I'll need to look this one up as well.