So need some ideas. currently My system is sitting where the spare tire is. Its sitting on the plastic cubby holes where the foam holder use to sit. Now my plan is to rip those plastic holders out and build the box right to the floor of the car. I want to attach it to the mounting brackets the plastic holders use.

My question is what do people think would be the best idea in order attach a mdf box to the brackets? there will be mdf across the whole floor.

 

Bolts. Run a couple carriage bolts to the body and call it a day. I built a false floor and my enclosure sits in the false floor. I have an 18"x36" hole in the false floor to accommodate my enclosure.

 

did you run a bolt through the floor?