96 Taurus Headlight Assembly Replacement

Can anyone tell me how to replace this assembly? I have removed all 3 visible nuts/screws that look like it would hold the assembly in and tugged but the whole thing will not pull out...I do not want to pull too hard in case there is something else to do. I want to replace the units because the adjustments for both sides' headlights are broken. Anyone who has done this on a 96 or similar model, I would appreciate the help...Thanks.

Are you still looking after 2 months ?

There is a 4th bolt next to the L/R indicator (Left/Right) it is the only other 10 MM bolt head in the area. Once you remove this it slides right out.