hey i have a question about wiring up an alternator on my 350 i have the lead going from the back to the pos. batt. terminal but the two prong plug where does that run to?...i have a little black box which is not hooked up laying in trunk from last owner. the alternator was never hooked up on the car can anyone point me in the right direction i dont understand the wiring diagrams so there no real help thanks again for your help!!!