Ok you have it here are some pictures, the switch just pops out and has two wires that slide on the switch then it pops back in.
DONT FORGET TO TRIP THE BRAKER OFF BEFORE POPING SWITCH.
you could get an electrifying experance,
[IM]http://i89.photobucket.com/albums/k212/dkr9925/Trailer%20Ideas/switch4waterheater.jpg[/IMG]
http://i89.photobucket.com/albums/k2...aterheater.jpg
http://i89.photobucket.com/albums/k2.../switch1-1.jpg