I"m wanting to put a battery on my boat, and am pretty sure my engine has a charging coil already in it, and just need to wire in a regulator/rectifier. I can't bring myself to spend $120 for the OEM one, when I'm pretty sure one of the generic ATV or motorcycle ones should work. My motor has black, yellow, and white wires coming from the assumed charging circuit, and want to make sure I hook them up right. Any thoughts?