Lenovo ThinkCentre 7515 Maintenance Manual page 112

Figure 21. Installing the primary hard disk drive into the bracket
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Hardware Maintenance Manual
7. Remove the hard disk drive from the blue bracket by flexing the sides of the
bracket enough to slide it free from the hard disk drive.
8. To install a new hard disk drive into the blue bracket, flex the bracket and
align pin 1 , pin 2 , pin 3 , and pin 4 on the bracket with the holes in
the hard disk drive. Do not touch the circuit board 5 on the bottom of the
hard disk drive.
9. Slide the new hard disk drive into the drive cage until it snaps into position.