The stainless snaps off the retaining straps. Under the stainless are the bolts that hold the straps and the seal down. I assume you have the interior trim pieces removed. You can see the nut plates from the bottom side. I used a pair of cargo straps to pull the new glass down into place after putting a protective cover on the plexiglass. I also used a method to reinstall the straps that was recommended by a member of another forum. If installation seems to be more than you bargained for I'll pass on what I was advised to do.