update:
I did purchase the 8mm swivel head wrench (which was crazy expensive btw lol) to get the job done. Had to remove a few interior trim bolts and pull the trim out of the way to get to all four bolts. The trim running along the spare tire well was rather difficult to pry up and those retainer clips will easily break if the hulk comes out. I found if I pried in slight increments I could reduce the chance of breaking or tearing the trim.
The Engineers do not keep in mind that all parts need to be easily accessible. The access hole, inside the trunk behind the light is meant for replacing bulbs and not meant as an access to the bolts holding the lamp housing.
So, having first hand experience now in replacing the rear corner tail light housing, the interior trim will have to be pulled away enough to allow the hand to slip between it and the frame to the bolts. prepare for knuckle blood.
thanks again for the suggestion on the swivel wrench