Replacing a left back tail light how to get the fixture off where are the screws on 2006 Ford Explorer

I see the 3 obvious screws to take off and the light fixture almost comes off but it is still held on by another screw that I seem to not have accesss to and the manual doesn't give any info on changing it.

2 answers
most of the time that is a push in clip try using a teflon wedge to pop it loose
you need to nudge it a lil more...