As for the idea of mounting through bulkhead where switch would be on basement side of 5th wheel and connections in front compartment by the battery - does not look like it will work. On Cruiser FW this bulkhead appears to be 2" thick.
If you really wanted it in the left side basement of Cruiser FW, you could loop some extra long battery cables over and through slots at top of bulkhead. Factory has other wires going through there already. Alternately, you could drill holes big enough to run the cables through the bulkhead.
Then on basement side of bulkheadmount a double wide junction box with either a blank face that can be drilled or cut to mount the switch or some other face plate that would accomodate mounting the switch.
Has to refill one of my propane tanks yesterday so while I was at it I decided to put one of the dicsonnect's like Lloyd showed; piece of cake to install. Thanks guys, it works slick
Jim
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Jim & Linda Tator
Watertown, WI
2013 Crusier CF34SS GMC 3500 8.1L Dually
154 nights in 2013 - 4,370 miles
178 nights in 2014 - 5,082 miles
365 nights in 2015 - 6,040 miles