Dell Alienware Area-51 R3 Threadripper Edition Service Manual page 108

a. tabs (2)
b. screws (3)
c. chassis
4. Remove the two screws (#6-32x6) from inside, securing the base panel to the right side of the chassis.
5. Release the tabs from inside the chassis on the right side, securing the base panel to the right side of the chassis.
a. screws (2)
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