A funny thing happened when I installed a disconnect switch today. After adding it, I disconnected it (unscrewed the disconnect screw) and turned on the main battery switch to confirm all was off, and the vent fan went on (it was on when I turned the power off). Also the cab radio had come on. I think what is happening is that the wire connecting the two ground terminals is still connected to the coach ground wire even when the battery is disconnected, so it's running off the one battery. (See pictures of setup below.) So do I need TWO battery disconnect switches to completely shut off all power while in storage? Or should I attach the ground terminal connector wire to the battery side of the disconnect switch so it doesn't touch the coach ground wire?
PS: in case my footer doesn't show, it's a 2016 Forester 2401R MBS.
Land of 10,000 Lakes
2016 Forester MBS 2401R