I bought a Mechman high output alternator for my 2005 24V with the Marine Power 5.7 340 HP. There is a wire that went to the old alternator that I can't remember where it went. It has a very unique boot shape and I am hoping someone knows what it's for and if I need it. The new alternator only has one two connections. A switched power to turn it on and the positive out to the battery/start solenoid. I have identified the switched power which is the purple wire from the original 2-pin connector. I just don't know what this other wire was for and if I need to connect it to something.