225 Slant no spark

The jumper from battery to coil+ will get it sparking for now just to test the engine. I had to hot-wire my 64 Valiant slant like that to get it home since the key switch wiring had been buggered (fool wired electric radiator fan to ignition w/ no relay). After 5 min driving, it started missing badly >45 mph and the coil was real hot, so I ran another jumper to wire thru the ballast and was then fine.

For long-term, consider installing the better 1965 bulkhead. I did in my 64. I had to cut the sheet-metal opening ~1/8" taller. I bought the bulkhead on ebay (completed cabin harness for 65 Fury). In 1965 (and 63), they used 2 big buss-bars to feed the high current ALT and BAT wires thru, so you don't get the infamous "melted bulkhead" problem.

The terminal inserts are common "Packard 56" or "56 terminal", used on Mopar and GM (and home appliances). You can buy on ebay. Many photos here detail them. Use a thin screwdriver (or special tool) to release the females. Squeeze the male ones longitudinally at the base to release.

At same time, I totally rewired my engine side, using a relay/fuse box from a Jeep, in both my Dart & Valiant. Need to do similar for my Newport since its engine wires are brittle. The cabin wires are good in all 3 cars, other than PO hacks I had to fix.