I have extra wires at my ignition. 1990 force 50 model 507X90D. The extra wires are Purple, black with yellow stripe, green w/yellow stripe, tan, blue w/white stripe, and gray w/purple stripe. I know the previous owner used some of them as they have connectors on some wire. The tan is for overheat buzzer I know that. The green w/white and blue w/white run back near by starting solenoid but are not hooked to anything although they have connectors.( I was thinking TNT} I have an ammeter I got off another boat. It has two prongs on the back. I would assume one would be for hot and one for ground ?? Are one of these wires supposed to be a hot wire for accessories? Can the hot side of the ammeter be hooked to the hot on a tach as well ?