Lenovo ThinkStation 2551 Hardware Maintenance Manual page 144

6. Flex the retaining clips as shown to remove the hard disk drive from the bracket.
Figure 73. Removing the hard disk drive from the bracket
7. To install a new hard disk drive into the bracket, flex the bracket and align pin
5 on the bracket with the corresponding holes in the hard disk drive.
Important: Do not touch the circuit board
.
8. Connect the signal cable and the power cable to the new hard disk drive.
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ThinkStation Hardware Maintenance Manual
3 on the bottom of the hard disk drive.
1 , pin 2 , pin 4 , and pin