]My Alt has 3 connections, one that goes to the battery, one that goes to my dash gen light, and a ground. supposidly the gen light plays a huge role in my charging system if its not hooked up it wont charge. im not too sure what kind of power that gen light line has. if all else fails could I just wire a manual toggle switch with a hot acc wire from my fuse block and when my car is on turn the switch on to turn the second batt n to charge?