Really? I've never seen an RV water heater with the switch outside. Why don't you install a switch inside like over the kitchen counter and route the wires down through an under counter cabinet to the water heater?
Yep! Mine was wired with the switch outside and I ran the wiring up behind the sinkbase cabinet and installed the switch. Harvey, your rig probably has the Atwood hwh... ..... ours is 'the other brand':-laf:-laf:-laf I had the Atwood in my old MH and it was superior to the one I have now. Don't say it... . I know:-laf:-laf
Alan