Jarge, I agree. The positive cable from the battery to the stud on top of the starter should be the heaviest wire possible, and as short as possible to limit the amount of resistance in the wiring.
I ALWAYS replace the cables when I change the battery. Just like the little battery in a smoke detector.
Can you imagine my mood if I ever went to all that effort and chose not to replace the cables? I just double-dog guarantee you that within a week I would have to go through the whole mess again and replace the cables anyway.
