I'm not sure how this is going to come out, but we'll try.
You can see the channel in this photo. In the center of the channel the bow is split. On each side there is a small "t" head pin that fits into a channel on the top of the windshield frame. You notice the two wings on the sides. Those slide down firmly over the windshield frame and clamp to hooks that are premounted on the side of the windshield frame.
You can just see the pins in the bottom of the frame.