The wires needed are:
Red---12v in
Black--- ACC
Yellow--- Start circuit to relay
Brown---Ignition while in start position
Blue----Ignition while in run position and voltage to regulator, Alt and sometimes 6-
pack Inti-diesel sol.
Extra wires like that black one can be used for turning on a relay for another circuit. Use a test light to see when it is hot. (Start or run) Then decide if you want to use it for something else. If not, tape it off and get back to work!