Here's a picture of mine, there's a better picture of the lower one in my build thread, last post of page 6. I don't remember how the screw attaches, but looking at your trim I would think it goes in that last hole of the one side that extends to the center, the hole in the trim. You might be able to knock that hole smaller so the screw grips. Also I notice the lower screw is more horizontal on mine.
