Electrical woes!!!

I am guessing your bulkhead connector is from a 1964 A body. Here is some maybe info:

Early-A bulkhead connectors had 2 connectors (1962-1966?). In 1967?, they added a 3rd connector for the wiper motor since it moved to the engine bay. Variable-speed wipers need many wires. I recall they put a few other functions thru the 3rd connector.

In 1962 & 1965, the large ALT & BATT leads passed via dedicated studs w/ screw connectors, not the spade connectors that caused melted terminals in later Mopars. For some reason, 1964 bulkheads (photo above) did not have these feed-thrus (my 64 Valiant doesn't either).

The 1962 bulkhead is not the same as 1965, with smaller connectors. See photos below. I don't know how many bulkhead variations exist. It looks like the 64 bulkhead has a smaller firewall cutout than 1962 or 1965. Otherwise, using a 1965 bulkhead might be better in a total re-wire. I haven't seen a 1963 or 1966. These photos are from current ebay listings (high-priced).

In your case, your mechanics are all thumbs with electrical wiring, as most seem to be. Using stubs of wire with butt crimps and wrapping with electrical tape is ugly, amateur, and will lead to future problems. Wire extensions should be done with solder and heat shrink.