[Mike Goble]

I have trunk mounted battery in aluminum battery box. 1/0 ga weld cable goes to mini starter. Thinking of using a 300 amp AMG fuse to protect system. Has anyone fused the negative side of battery? Thank you, Lenny

Electrically, it makes no difference on which side of the battery you put the fuse.

 

[Mike Goble]

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.

You should be careful about installing a jumper on the starter as this may cause run-on if you are using a PM starter.
If you look at any OEM rear-mounted battery installation, like BMW, Volvo, Jaguar, Saturn, etc., they don't use a secondary relay in the circuit. What they do is properly mount and shield the battery wire.