I recently put two 12 inch subs in my 98 accoard 4 door ex. Now, the license plate rattles really bad when the subs hit. The license plate only attaches at the top. There aren't any holes of fasteners to attach the bottom of the plate to the car. The bottom of the plate sticks out about 1.5 to 2 inches from the car. What can i do to fix the annoying rattle. Can i drill the botton of the plate into the trunk to attach it?