I bought a Warn M8000 used, I have everything where I want it, but besides the two 2ga primary battery hookups coming from the solinoid box, there is a small black 14ga wire the same length as the primary cables. The small wire has a large ring terminal like it would also get hooked to the battery. The winch used to be installed on a 1/2 ton Dodge bush guard style mount. Any Ideas what the small cable is for and where it hooks to?