I had one added to mine and the transfer switch is located under the stairs. If you takedown door side rear wall of the storage area off it is easily accessible and the dealer actually moved the transfer switch closer to the outside wall and mounted the circuit protector where the transfer switch was located. They ran the the remote readout into the wardrobe closet where the rest of my controls are located. The rig is not at home or I would take some pictures. Hope this helps.
Craig & Terry in Tennessee
2013 Pinnacle 36 KPTS, Voyager Rear View Camera
2012 F350 CC LB King Ranch, 6.7L TD, Ford 25K hitch, TM TPMS, Diesel Site Coolant Filtration System