How to mount driver side stealth box

I've got a 10" driver side stealth box from subthump.com
It doesn't have any holes or anything drilled in it as far as mounting it. I have a habit of taking turns quite fast and also race, so I want it screwed or bolted down, what have you guys done.

look at my pic on my site. It's the pic called "sub"

Here's what I would suggest. And by doing this, you won't have to put screws into the meatal of the car and no brackets will be visible.

You know that triangular shaped bracked in the top corner that the hatch panel fastens into. All you need to do is connect a "L" bracket to the back of the box and put a small machine bolt thru the both brackets and put the panel back on. Simple, sturdy and completely hidden. e-mail with questions or other possible solutions:D