Lenovo ThinkCentre 3656 Hardware Maintenance Manual page 109

7. To install the new drive into the blue bracket, flex the bracket, and align the
pins 1 through 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.
8. Slide the new hard disk drive into the drive cage until it snaps into position.
Chapter 8. Replacing FRUs - Tamdhu Computers
103