[Shotimes] head unit

[George ask me]

hey everybody,
 
I was wondering if you know how to get to the radio/head unit in the dash of the '89 SHO.  The screws have some weird star-shaped design, and I don't know which ones to remove to get the cover off of the radio...
 
I have to take the radio out because I believe the antenna connection must have come loose, because I can't get radio stations.  Or I might just install my other head unit.  Please help, thanks.
 
George
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