I added a separate cord for the rear A/C. I never installed a switch, but can move the plug on the Cord from the A/C to other outlets labeled Pulse-Air, Generator, or an exrension cord that goes to Shore Power. Now I just have to remember from trip to trip what is plugged where. At home i have a 30A outlet, so I use the Pulse-Air which alternates the front and rear A/C on a 7 minute/5 minute cycle.
Ken, Judy, and the Angels--2005 Fleetwood Southwind--2008 Cargo Trailer--2003 EZGO Golf Cart