You see where the bulk head connector is? the "P" terminal? That is the one that melts on Mopars. Lots of currant is going thru there, the whole cars power actually..
My 69 Bee had that terminal melted a bit and it acted up occasionally. I could wiggle the harness going into the bulkhead and it would start. I finally just drilled the cavity out and ran a 10 gauge wire through. McGuiver'd the thing but it worked.