[Tom Goldman]

Ron to do it correctly you will actually need to run 2 positive cables to the back of the car,one from the front battery to the kill switch,and one back to the solenoid connection from the kill switch. ..... ,so the shut off switch kills both batteries. ......I prefer to run them inside the car,if possible ,away from the exhaust and eventual oil that will get on them. .......You can get some real nice bulkhead electrical terminals from Jeg's that eliminate holes with grommets............The rear firewall can be screwed ,riveted, or welded, just so it seals the trunk area. .....Tom