HPE ProLiant MicroServer Gen11 - Page 27

7. Remove the chassis cover:
a. Loosen the cover thumbscrews.
If the thumbscrews are too tight, use a T-15 Torx screwdriver to loosen them.
b. Slide the cover about half an inch towards the rear panel.
c. Detach the cover from the server.
HPE ProLiant MicroServer Gen11 Maintenance and Service Guide 27