66 Barracuda interior questions

My first question, is there a way to eliminate the ripples in the back glass seal, I attached a couple of photos? The seal looks fine all the way around on the outside but not the inside regardless of whether the lock strip is in or not. I may just have to live with it that way.

My second question, can someone tell me where the primed part is installed in the rear seat/cargo area. Putting the interior back together and I don't see this part in the service manual.

Thanks

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