Damned bulkhead connectors.

If you install an under-hood relay/fuse box from a newer car like I did, most wires thru the bulkhead can then be small (24 awg) since they then simply turn on a relay. You could then use two connectors, one for small wires and one with bigger pins for the remaining loads. The only ones that carry any power in my cars now are the thick ALT & BATT wires, and the turn lamps. If you do the "MAD Bypass", you can eliminate the ALT wire.