On most boats it is glassed in I think. If your adding a sub you will need to make the cutout with a saw. Can you post pics and more about what you need to do.
Ok no problem, Let me see, get a 10 mm and a flat head screw driver remove the heater tube, and the fuse pannel, then Place this where the kick pannel sits light it and the and run
I have a collection of photos of how I removed the foot rest from Jasons 209. Im sure yours is not the exact same but you can get the idea. www.svtsupercharged.com/gallery