With the back of the device towards you, start on the left panel

It is connected with 6 clips at the lower part, and several more for the top part

Carefully pry loose the clips from the bottom upwards, starting with the clips on the bottom (red arrows)

next open up the clip next to the power cord

open up the three clips on the side of the panel (orange arrows). Locktabs grip the holes in the orange clips 1 and 2. They will let go if they are lifted directly outwards from their base. Just next to the locktabs are guide pins. they don't offer resistance during removal.