HPE ProLiant ML30 Gen10 Plus Maintenance And Service Manual page 56

If the server is in rack mode, remove the server from the rack .
5. Remove the front bezel .
6. Remove all drives .
7. Remove the access panel .
8. Disconnect the drive power and onboard SATA cables from the drive backplane.
9. Remove the 4 LFF drive cage.
10. Remove the 4 LFF drive backplane.
HPE ProLiant ML30 Gen10 Plus Server Maintenance and Service Guide 56