Kirk-
As I recall, when I had mine open for a repair in 2007 it was hinged at the top and there were two bolts underneath the bottom lip, one near each end.
By the way, while you are in there, check the mounting of the air conditioning fan assembly; Monaco didn't have a great design when ours was built in '06, and the wimpy mounts let go, allowing the fan shroud and all to fall, badly damaging fins of the outermost (AC) radiator.
Joel