HP ProLiant ML350 G4 Server - Manual (Page 64)

64 HP ProLiant ML350 Generation 4p Server User Guide
5. Using the T-15 Torx screwdriver attached to the back of the server, position
two screws in the upper mounting holes on each side of the drive cage.
6. Slide the drive cage into the chassis until it locks into place.
IMPORTANT: Be sure that the unit identification numbers (0 and 1)
appear on the right side of the drive cage front panel.