Windshield Subwoofer Help With Putting A Subwoofer In A Convertible?

Help with putting a subwoofer in a convertible? - windshield subwoofer

I have a 2001 Chrysler Sebring LX and I bought a subwoofer for the (a sub-distribution with energy Infiniti Basslink). My question is ... I have a rear window, the vibrations of the vibrating beneath the glass to break? Should I point the Dynamat? (This may be a silly question, but I'm Clueless!) The reason I ask, because it will be replaced as a super-expensive glass, and I would be able to avoid it. Thank you!