custom trunk panel

[dairdvl]

ok everyone
looking for some help and pics. i want to do just 1 panel in the front of the trunk of my 69 nova to mount 2 amps and one sub. the sub i have is already boxed so i was going to mount that in the center and cut the panel around it and mount one amp on each side.
i plan on making a template from cardboard then using MDF for the panel wrapped with fabric
how do you secure the panel to the floor of the trunk?
thanks