I recently purchased this motor and need a tach gauge.....the motor runs great no issues. I ordered a new tach and went to hook it up but cant find the wire to hook up to it. I have 3 wires that are black,gray,green I think these are trim wire gauge. I do not have any other loose wires to hook up?:facepalm: If i ran a new wire to the motor where dose it hook to?