I would highly suggest doing Nachos bulkhead parallel bypass. You run in addition to the OE 2 main in/out wires/4 brass terminals, with 2 new wires seperately around the bulkhead/thru a new hole/grommet in the firewall, like exits that curve around a border crossing/keeping the OE bulkhead 4 brass terminal connection OR just drill out the 2 bulkhead cavities for those 2 wires & run/solder 2 new wires straight thru with no brass terminals (leave 6" of the 2 wires behind the rear bulkhead half so if you have to pull em apart in the future you can do so).