Burnt out ammeter

I have been following the thread on ammeter problems, my 66 383 newport just had same issue, the wire burned to a crisp. I understand the bypass procedure, however my ammeter in addition to the black and red heavy wires, has a 3 pin connector that was damaged also. If I understand correctly, the 2 main wires feed the power to the ammeter, now how do I get power to the 3 pin connector that burnt also? Thanks for any help