95% of my electrical components are crammed under the bed in the rear. Look around the electric breaker panel inside for a removable access panel. It's intentionally a little difficult (screws & such) to keep accidentally curious fingers out. Mine also has a large removable panel in the back wall of an outside storage compartment which is under part of the bed. That's where our transfer switch is located.
Actually the breaker panel itself is usually easy to remove... there's a couple small screws holding the cover on, then four screws in the corners holding the whole panel in. Obviously - make sure shore power is unplugged!! By pulling that, you may see an easier access from behind it.
__________________
|