look on the bottom edge(underneath) that panel/door, you should see 2 screws holding it shut; then open the door beside that one, you should see 2 or3 screws in the side brace that go into the side of the "fan" door.
2000 Winnebago Ultimate Freedom USQ40JD
, ISC 8.3 Cummins 350, Spartan MM Chassis. USA 1SG, retired;PPA,Good Sam Life member."We the people are the rightful masters of both the Congress and the Courts - not to overthrow the Constitution but to overthrow men who pervert theConstitution. "Abraham Lincoln"