HP ProDesk 400 G3 MT Hardware Reference Manual page 33

6. Slide the drive into the drive bay (1) and install the four 6-32 mounting screws (2) to secure the drive in
place. Connect the data cable (3) and power cable (4) to the rear of the hard drive.
NOTE: HP has supplied four extra 6-32 mounting screws on the front of the chassis behind the bezel.
Refer to Removing and Installing drives on page 19
mounting screws. When replacing a hard drive, use the four 6-32 mounting screws that were removed
from the old drive to install the new one.
7. If installing a new drive, connect the opposite end of the data cable to the appropriate system board
connector.
NOTE: You must connect the primary hard drive data cable to the dark blue connector labeled SATA0
to avoid any hard drive performance problems. If you are adding a second hard drive, connect the data
cable to one of the light blue SATA connectors.
8. Replace the computer access panel.
9. Reconnect the power cord and any external devices, and then turn on the computer.
10. Lock any security devices that were disengaged when the access panel was removed.
for an illustration of the location of the extra
Removing and Installing drives 27