Alienware Area-51 R3 Threadripper Edition Service Manual page 127

2 Press and hold the securing tab on the chassis and slide the power-supply
unit into the chassis until it snaps into position.
Figure 52. Replacing the power-supply unit
1 securing tab
3 Align the notch on the power-supply unit cover with the tab on the chassis.
4 Slide the power-supply unit cover towards the tabs until it locks in place.
5 Replace the four screws (#6-32x6) that secure the power-supply unit to the
bezel.
6 Connect the power cable to the power-supply unit.
2 power-supply unit
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