It was very difficult to spot.
Thank you! that shot was invaluable.
As I have said prior, I am going to head this one off before it leaks on me and apply some flexible sealant over the area where the crack is and also around the brake light assembly to form a gasket on top of where the fault will form. this shows me I am likely going to be able to get to the area where the fracture actually happens without any tight spaces tools.
All said, if it doesn't crack on me, I'll never know if it did any good. the only way to know for sure would be to have it crack and still not leak, and I really don't wanna face down that beast with FCA warranty.