Picked up a B&S twin Vanguard, model 303447. Has the key switch on the engine. There are two yellow wires from the alternator into a plug. Coming out of that plug those two go to the reg/rect, which is normal. BUT, there are two additional yellow wires out of the same plug that have been cut. Have no idea where they were to go to or what the engine was on originally. 16hp horizontal shaft. Any suggestions ? ?