Got the cabin, sub and amps done last night, didn't run into any real issues other than the factory speaker wire not being long enough in a couple places. I am debating on how to mount the xm9's. The current tower speakers are the Roswell 4 speaker combo spinners mounted to a flat plate on my 2015 Mojo with the OZ HD tower. Do I drill new mounting holes there or drill the tower and use the big clamps?