Don't know the cable you are talking about, but if you work on it, please be careful. Remove any rings and jewelry, it can ground out and severely burn you. A friend almost lost his ring finger to such a burn. Always disconnect the negative cable first, since if a wrench hits ground, there is zero electrical potential. Once the negative is off, if you ground out while removing the positive, it has no path to ground.

Good luck on the hardware problem.