ive ben trying to swap a eng in my car well i got the new one in and cant find the altinator plug that goes in to the back. it should have a round looking plug and the one the screws on to the top is the only one i can find but theres 3wires that are broken i think they might be where the plug was but itjus got broken off.So what color should thay be and where do thay go form the ALT.