HPE ProLiant DL385 Gen10 Plus v2 Maintenance And Service Manual page 64

Remove the server from the rack .
4. Remove the access panel .
5. Remove the PCIe riser blank:
Secondary
Tertiary
To replace the component, reverse the removal procedure.
Removing and replacing the PCIe riser board Removing and replacing the PCIe riser board
HPE ProLiant DL385 Gen10 Plus v2 Server Maintenance and Service Guide 64