Great Ideas! I have a brake wire. The truck was used to pull an Airstream. I bought this Diesel because I thought I might upgrade to a fifth wheel  but TC works better for this lonely boy. Did fuse the #10 to house batt. This truck disconnects camper batt, with ign. off. Thanks for the aux. batt. bracket info. I was looking for a spot to add a extra batt. My camper batt. is relocated  next to water tank to make room for the A/C. ( Previous owner screwed up that and I bought the TC thinking I would finish his screw up work.)