Fujitsu CELSIUS M770 Operating Manual page 75

System expansions
► Slide the accessible drive into the casing until it engages in the locking mechanism.
► Connect the cables to the drive. Make sure the polarity is correct.
► Close the service door (see "Close service door", Page 46).
► Close the casing (see "Close the casing", Page 44).
It may be necessary to modify the entry for the drive in the BIOS Setup.
Fujitsu 71