I researched mounting a battery in my trunk and found what I think is a better way to wire it. I used a Ford starter solenoid in the trunk at the battery, ran my positive cable from the Ford solenoid to the starter solenoid at the starter post and a purple wire from the ignition switch start circuit to the Ford starter solenoid "S" terminal. I believe I had to install a jumper wire from the starter battery terminal to the starter motor so the motor will spin as well as the bendix engaging. With it wired this way, the only time the positive cable is powered is when the ignition switch is turned to the start position, seemed to be safer that way. I also ran a fused 8 GA wire from the battery to the horn relay terminal, I believe, to power the rest of the accessories. The negative cable I ran from the battery to the engine block. I'm sure there was other wiring needed but that's the short version of the story.