The best place to secure the amp in the boot of the pinny is on the leftside where the little air vents are. (just below them)
its a good place because under the plastic bumper there is a little air duct and the flows through there and into the boot therefore keeping your amp kookÂ
1) Remove the left carpeted panel by removing plastic support screw, i found it easier to remove the ones towards the rear seats first, then the other three on the side should just pop off, don't be afraid to give them a bit off a pull they don't break that easily.
2) Once the carpeted panel is off obtain a piece of MDF bout 12mm thick will do and secure in to the pack of the panel with screws (no glue required) to help support the amp because if you just screw the amp on the panel will lean in and the amp will vibrate.
Don't place an amp on the back of a sub box because when the sub puts out mega bass the electrical internals in the amp may vibrate loose and parts could become weak inside the amp therefore the amp could screw up.