i had my subs for a while and never screwed down the box properly. where is a good part of the car to screw the box down at? pics would be greatly appreciated.

 

Right now I have my Bazooka screwed to the particle board under the carpet in the trunk.
Before that I tried heavy-duty Velcro but that didn't work well. Only reason I did that is because I have to remove it for autocross.

 

look at the hardware used to mount the spare tire....