There are screws that go up into the overhead cabinet. IIRC you will need to remove the blind at the top, push to one side and then pull down on the other, it's a bit of a pain the first time until you see how it works then it's a piece of cake.
2002 Dodge 3500 2wd dually, cummins, 4.10 gears, 10500gvwr, Rancho 9000's shocks
2005 Bigfoot 259.6E, 80watt solar, eu2000 Honda gen., 2x group 31 AGM bats., 7100 btu aircond, electric rear step.