My apologies for the horrid picture...let me explain a few things.

The box will be designed so initially, it is a very tight squeeze to fit into my trunk on my 2dr civic coupe.

After its placed in (subs facing backseats), there will 2 be "add ons" which are bolted to the box on both side "brackets" (brackets = green, latches = red), and top to "extensions" on the box (the yellow things in the pic)

The "extensions" (yellow)are just extra sides glued onto the box, to make it longer and so I can attach latches(red) to them that can be drilled through the wood, without making the box not 100% sealed.

The "brackets" (green) are attachments to the box with the other end of the latches, so it makes the box fit the entire width inside of my trunk, so unless the latches are moved, or unless you can break the car frame or box - is not coming out.

The carpet on the brackets would extend about an inch onto the box itself, which would have Velcro, in which would have to be pulled back to reveal the latches. Hopefully camouflage it to any potential thieves so they would not notice it or the brackets.

The subs are facing the rear back seat, which is completely locked and back seats are unable to be pushed forward unless you have my car key (there is no switch for it, uses my carkey) so no one can get to my amp, or unscrew my subs from the sub box.

Well thats it,hopefully it made sense...Any questions or suggestions before I build this bad boy?

PS getting OEM matched carpet, so it will HOPFULLY also just look like I have a tiny ass trunk space.