Dell XPS 720 (Mid 2007) - Manual (Page 126)

126
Removing and Installing Parts
6 If no screws are attached to the drive, check the inside of the drive panel for screws and, if screws are
present, attach the screws to the new drive.
7 Gently slide the drive into the drive bay until you hear a click or feel the drive securely installed.
1 optical drive 2 shoulder screws (3)
1 drive release latch 2 optical drive
2
1
1
2