if this is a front 1/4 vent window.......
if its a rear window i've just wasted a load of words
front 1/4 vent
the frame is like a
4 shape
the perpendicular cross of the 4 has a coin sized circular section that needs to be clamped to the door inner.
through the door caping inside usually directly below the downward slash of the 4 and often under a black plastic grommet or under 1 pin of any interior badge trim is a hole
down that hole should be a allen headed screw
that allen head screw screws into a piece of metal that has a nut welded to it or if it has been replaced a 1/2 inch by 1.5 inch by 1/8 inch thick rectangle with a threaded hole
this bit clamps the frame at the perpendicular cross point on the
4 to a section of the door inner structure
bolt followed by frame followed by bit of door structure followed by chunk of metal with threaded hole i think.....
thus the frame is supported there and can then be rocked forward or back in order to align its front edge with the door opening
you adjust it via the 2 studs in the coor Jam
allen or slotted wind the suds out to push the frame from the door inner surface
wind the studs in to pull the frame leg to the door inner surface
the studs also have an offset collar which within 1/2 a turn will waggle the top of the frame, the point on the top of the 4 in and out so it can be positioned to seal against the roof rail rubber.
when in the right place hold the stud and do up the washer skirted Nut the nut and washer are 1 part but the but turns and the washer doesn't...they are pressed together
dave