Changing Taillight 2002 ZX3

How do I change Taillight Bulb (Rear Driver's Side)

Open the hatch, remove the plastic thumbscrews and remove the housing & lens assembly, then you can get at the sockets.

I removed one Plastic Thumbscrew and screw upper right corner of Lens Assemlby Housing wont come off am I missing another Plastic Thumbscrew

I think there are two thumbscrews.

There is 1 plastic thumbscrew and there should be one regular black philips head screw on the outside portion of the tail light which is only visible while the hatch is open.