You have to take the stereo out, and then there are some screws that need to be removed. I have had mine apart a couple of times. Download the 2005 SRT-6 Service Manual from here, and you will find detailed instruction on how to remove all the pieces.
https://www.crossfireforum.org/forum...ollection.html Don't worry that it is for SRT-6, as it has information for the NAs as well.