hello im building my boot out with two 10s at back and an amp on each side only think im having trouble with is were and how do i mount the wood to the boot it self

Most installs ive seen, including my EL, the base panels are cut to fit tight in the groves in the boot, and become firmer and neater once they are wrapped in the covering/carpet material, and they are also kept down but the weight of them. You dont want to be stuffing around too much if you need to get your spare out... assuming you will still be carrying a spare.