speaker upgrade

I am working on an audio project where a set of speakers are installed in the existing pockets in the rear seat side panels. How do these panels come out ? Where do you start and what else needs to be removed to access that area ? I assume they are held on with clips and or pins like the rest...

I recently changed out the speakers in my (9 spkr system) 2010 FJ.....Here are some things that might help others... #1 --- A Dremmel is your best friend ! #2 --- A solder gun/iron is a MUST!!!!! #3 --- Crutchfield is only MARGINALLY right about what fits and which wire . ...