HP ProLiant DL560 Gen11 User Manual page 143

c. Verity that the processor is properly secured by the carrier snaps.
18. Remove the dust cover from the processor socket:
a. Press and hold the grip tabs on the dust cover (callout 1).
b. Lift the dust cover away from the bolster plate (callout 2).
HPE ProLiant DL560 Gen11 Server User Guide 143