Manual also available at:
http://manuals.adventurerv.net/Atwoo...-93755-10E.pdf
Cliff notes version, the black-white-green wire bundle goes to the 120v supply. Switch plate gets wired as follows, as viewed from the back:
Orange, lower left
Blue, center (either upper or lower)
White, lower right
Then fused power goes to the jumper wire on the top left or top right, whichever side has the terminal to connect to.
The green wire is connected to trailer ground, and to the center connection on the switch plate (either upper or lower, whichever one doesn't have the blue wire).
Good luck