Lenovo ThinkStation P310 Hardware Maintenance Manual page 160

8. Align the four holes in the secondary hard-disk-drive cage with the corresponding four tabs on the
bottom of the bay as shown. Then, position the cage onto the bottom of the primary hard-disk-drive
bay so that the tabs on the bay pass through the holes in the cage.
Figure 110. Positioning the cage onto the bottom of the primary hard-disk-drive bay
9. Slide the secondary hard-disk-drive cage to the left of the chassis until it snaps into position and the
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screw hole in the cage is aligned with the screw hole
Figure 111. Installing the secondary hard-disk-drive cage
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in the bay.