1990 bonneville radio removal

I have removed the two bolts that supposedly hold in the old radio, but I can not pull the radio out. Something else is holding it in place. How do I get out the old radio?? From my prying from all sides it appears too be something around the top center that is holding.

There is one screw under the radio accessible once the ashtray is removed. After that it might have a slight load on the lower front bracket that can be released with a small screwdriver.