Yes, the JR Products Compact Automatic Changeover 2-Stage Propane Regulator # 37207-31525 does come pre-adjusted for 11 W.C. of pressure. You will need the Thread Sealant Tape # 37207-30025 to seal the outlet to the hose on your trailer. I recommend using 2 of the GasGear 90-Degree Propane Hoses # GS47FR as the 90 degree fitting on the end is less stressful on the hose. view full answer...
You can run the ground wire of the Redarc In-Vehicle BCDC Battery Charger # 331-BCDC1250D to your trailer frame without having to bridge any riveted joints. As far as best location for the bolt you'd have to find a location that makes the most sense to your application that's out of the way and would be protected from elements. view full answer...