I faced mine in to the rear seat. Only one 10" sub. Door locks im sure no longer work. But if the thief was clever and strong enough to open my tire carrier he would soon find out that the hatch doesnt stay up on its own... Drivers side rear door doesnt open from the outside... I imagine they would lose the battle much like the thief's on Home alone!!

 

In my old car I drilled some screws through from inside on the box through the floor that way no one can see the screws. Then I put the subs in the box and used screws that needed a special triangle bit to bolt in the sub to the box. I figured that in case the thief came prepared with a screw driver there was no way they would have that special bit.

 

lol, i think that should do the trick then, Ill go ahead to home depo and buy some screws and strip then so not even i can undo it lol