Hey Daniel.
You probably already have this done, but if you don't, its best to put the whole thing together on the bench.
Tape everything into place every 10 inches or so. When putting the cord into the slot on the backside, create a about a 6" crossed loop in the center of the top and the two ends crossed about 6" at the bottom. Then set the windshield assembly in place, and start pulling the seal in at the center, both top and bottom. (This keeps the the windshield from riding up out of the opening.) Then work each side into place, saving the upper corners for last.
Hope this helps!
Doug-