I don't know if a 4awg wire will fit through there or not since I put 8awg. Measure your car from bumper to bumper and that should give you a good estimate as to how much wire you will need. I tried piecing everything together and realized I had spent more than if I had bought an amp wiring kit.
Since My GP didnt have binding posts on the battery, I attached the power wire to the jump starter bolt on top of the fuse box. My lights dimmed a lot even with a 2.5F cap. After I did the alternator rewire (running a wire from the alternator to the jump starter post) the lights where almost normal.
