I ran the wires under the trailer and wired it up into my front compartment on the utility side of the trailer, that's were I keep my leveling blocks so first and last cabinet I get into. That way kids or mischievous camp friends don't switch the power off while I am sleeping.
Always got to stay one step ahead of the brown bottle crowd when you go to bed early.
I also safety wire (with bailing wire) my valves closed it doesn't stop them but they messed with it once, I noticed and came prepared with a bucket when it was time to leave.
Learned that lesson when friend B opened and then closed friend A's black water tank valve. Friend A found out and paid friend B's kid $5.00 to open the cap for him. Friend B's kid got $5.00 and a new pair of shoes from his dad (friend B).