Alienware Area-51 R3 Threadripper Edition Service Manual page 156

7 Remove the four screws (#6-32x6) that secure the rear bezel to the top and
bottom of the chassis.
Figure 69. Removing the rear bezel
1 screws (4)
8 Remove the two screws (M3x5) from inside, that secure the rear bezel to
the left side and right side of the chassis.
156
2 rear bezel