Door panels. Look underneath the door panel and you will see a plate with 2 small screw that holds a retainer for the lower part of the door card. Many people miss this step. I use Rockford-Fosgate 5.25 speakers You do not want speakers where the cone surround or if its a 2 way with a center tweeter to protrude from the speaker front profile. Here's a link showing Ronny Shaver RROC tech removing a door card to service a switch
Thanks for the tips! One issue I've been wanting to fix is one of the rear window lift switches only works in one direction (down), so I was going to look into that when I have the door panel off... this video helped out with that as well.