Self tapping screws like the ones used in the Curt Friction Sway Control for Weight Distribution Systems # 17200 aren't meant to be torqued down. Simply drilling them into the frame until they pull the bracket tight against the frame is all you'll need to do. view full answer...
The breakaway for your trailer should have it's own dedicated battery like the Curt Push-To-Test Trailer Breakaway Kit with Built-In Battery Charger Item # C52042 does. The built in battery charger receives power from your 7-way connection to recharge the battery so you won't be hooked up to the trailer's battery at all and won't have any issues with your battery disconnect switch. view full answer...