I'm working on an old 92 MTD tractor, MTD-132-662F118. The unit didn't have a battery in it but the battery wires have me confused a bit! The Red and Black wires have a terminal for the battery and then another terminal that would most likely be under the shift area. I can understand that perhaps the Black (second terminal) could be mounted to a screw for ground but why on earth would there be another terminal on the Red? There smaller gauge wires that run off the battery terminals that does to a fuse. Anyway, included is a pic...anyone know why this is wired like this?