I bought a aftermarket voltage regulator for my 1997 Force 50hp and the wires coming out of it are 1-red, 2 yellows, & 1- black, on my old regulator I have 1-red, 2-yellows, & 1-gray. I know where every wire goes except the black. does it go to the gray wire? the regulator is one I seen on here (Universal Regulator/Rectifier 01-154-16) that someone else used on there 1997 50 HP & it worked great. Just not sure if I need to hook the black to the gray or not? all the other wire colors match.