I'm looking at battery relocate kits, and all of them seem to come with 15-20ft long pos cables, but 3ft neg cables.. where does the neg cable go? Straight to the chassis in the trunk? Seems a little weird to me...
Clean the metal surface and place it anywhere in the trunk. Need like a 3/8 bolt and it needs to be and stay tight. You should also run a ground to the motor block from the frame since the original wiring for that will be gone. You cant overdo grounding. Grounding issues will cause freaky problems.
BTW if you dont know the car is normally frame grounded. It cuts the wiring in half. It is a simple process, and easy to do. Just got to remember that all electricity flows in a loop. If the current cant get to and from the battery, you will have issues.
just remember that if you're running efi to reconect the eec ground thats by the starter solenoid. its liike like a fuseable link sort of. the computer will not work right without it. like one of the other guys wrote, ground it in back of the car and run it to the motor, thats what i did. i gorunded it using the old quad shock mounting plate, and then ran another ground wire to the block and it seems to work good, i haven't had any problems doing that.