Hi Pablito: If you have two different screws under there someone has had their hands on this. The latch is usually held in by a couple of simple pop rivets. Drill out the rivets and the latch assembly will come off. Clean out the holes and either fit in another couple of rivets or a couple of flush mounting self tap screws. If you need to remove the vent glass altogether you must remove the screw which forms the top pivot. This is one nasty unit as it is very soft and easy to deform. Soak it overnight with penetrating fluid and go at it very carefully. Once this pivot is removed, the glass just tilts out and pulls up. The bottom pivot is fairly long and should come up without much fuss. If the whole shebang goes south on you, replacements are available. Check out CIP1. Dan (MY72BUG) in Goderich, Ont
I'd rather have a partial bottle in front of me than a partial frontal lobotomy.