Biscuit, it is not always the case that jacks, slides, etc. are wired directly to the battery or batteries. I have a 2012 Voltage 3200, and the battery disconnect switch is in the thick hot (+) lead coming directly off of the batteries. I believe it is a marine type switch. When the disconnect switch is in the off position, there is no power to anything in the trailer. The lead coming out of the switch goes to a buss bar, and then the leads for the slides and jacks take their power from that buss bar.
For me, if the battery disconnect switch doesn't completely disconnect all power form the trailer, it is not really doing the job it should be doing.
