I don't have a photo, but yes the screws go through the plastic bead. You should be able to see screw holes in the frame where the old screws went in. That should give you an idea on placement.
There are a couple threads here about that plastic bead splitting. I'm hopeful that the newer ones don't have this problem. I would still pre-drill holes in the plastic slightly larger than the screw diameter, and use a small washer between the screw head and the plastic in an attempt to prevent splitting in the future.
2011 Jayfeather X23B
2001 Ford Expedition Eddie Bauer