Dell Dimension 3000 - Manual (Page 65)

Removing and Installing Parts
65
3 If you are replacing the hard drive, remove the drive from the bracket:
a Remove the hard drive-securing screws.
b Remove the hard drive from the bracket.
bracket-securing
screw
drive bracket
hard drive
bracket-securing
screw
drive bracket
small bracket
tabs (2)
drive-securing
screws (3)