I used 1/16” self-adhesive neoprene gasket material on the window between the aft edge of the window and the attachment holes. Just didn’t want to be dealing with adhesive if I ever needed to replace it. Working great now for over 350 hrs. If you can punch neat holes in the gasket, you could go beyond the holes with it too.
We attached ours with Sikaflex. Looks great, works great, no issues for the past few years since we did it.