as the whole seam was rusted and puckered and I was only able to redo the seam sealer up until under the window. what is a cheap quick fix without removing my rear windshield cosmetics are not important to me.
There are gaps in the window seal to the left and right of the area you marked in blue. I would use silicon chaulk, which remains flexible after it dries, to fill these gaps and see if that mitigates water getting into your trunk. If water is still getting into your trunk, the trunk lid seal at the bottom of the circle you marked in blue is not holding its shape and may be another cause of why water is getting into your trunk. Try pulling it up a bit to provide a better seal or replace it with a new trunk seal/gasket.