4.Align the hard disk drive so that the cable connectors are facing the diskette drive bays and the four holes at the base of the drive are above the four pegs, as shown below.
pegs5.Gently lower the drive over the pegs. When the hard disk drive is resting on the pegs, it will not move from side to side.
6.Lower the mounting bracket over the hard disk drive, making sure that the tabs on the computer align with the slots in the mounting bracket.