2006 Chrysler 300 Third Brake Light

Brakes problem
2006 Chrysler 300 72000 miles

OMG! I'm a 50 year old woman and I've torn this car apart trying to gain access to that dumb 3rd brake light. I've read your advise to others regarding this matter, but it does not seem to fit the configuration I have. I've taken out the complete trunk upper panel only to find a metal plate - no screws for additional access. I removed the trunk light, hopeing to gain access that way - No. I put the seats down and removed the 'button' holding the back 'tray' (don't know the right terms) only to find I would have to remove part of the seat trim package to remove that panel.

Please help. I really don't want to pay someone to 'change a light bulb.'

Thanks, T-