I'm assuming your talking about the rear side marker lights (red)?
Those are held in place with a simple spring clip.... For the rear side markers, start from the side facing the rear bumper. Gently... pry it out using a smooth, thin flat blade tool like a "worn out" screwdriver. (worn out, meaning no sharp edges) The front side markers, start from the side facing the front wheel well.
Of course... protect the painted panel surface with tape and/or cloth
.....and/or you can tape the tip of a screwdriver, but it usually makes the tip thicker and harder to get underneath the rubber seal.
Choritsu-shi :wink: