I assume also 68 is same as 69,(mine is 69..) there should be two small L shaped clips at ea end at bottom of opening to set glass on....they screw onto frame w one screw ea. If I remember right about 6" or so in from the end.
This was covered at length awhile back...maybe someone remember by whom or where... I`ll do this from memory ,since I did my w/s two yrs ago... Assuming you have the glass, there are a few different adhesives , tape and butyl type caulk...(gorilla snot! which I used) after you get the frame really clean , you practice setting the glass a couple of times (dry) so you get the feel for it... best is w two people ,one ea side of the car,lay the w/s on a blanket or towel on the hood, bring one arm thru the w/s frame opening, grab the w/s w one hand of ea side of the glass, bring it into position....practice to get it perfect ea time so you wont have to move it once its in the frame....then clean the frame once more, stick the gorilla snot on there w a caulking gun, set the w/s in place , press on it slightly to 'set' it.....re-install the trim...if you drive the var fairly soon, dont hit the brakes too hard! it may come out! best bet is to let it 'set' for a couple of hrs first...over night for instance