Dell EMC PowerEdge XR11 Installation And Service Manual page 108

Figure 110. Installing the 901E and MIL 461G drive rugged bracket
3. Rotate the bracket closed against the chassis and slide the latch to left and then right until seated firmly.
4. Install the front bezel
5. Using a Phillips #2 screwdriver, tighten one screw to the system cover.
Next steps
Follow the procedure listed in
108 Installing and removing system components
for Rear Accessed configuration.
After working inside your system.