Lenovo ThinkCentre 3026 Maintenance Instructions Manual page 148

6. Install the optical drive retainer on the side of the new optical drive.
Figure 62. Installing the optical drive retainer
7. Slide the new optical drive into the drive bay until it snaps into position.
Figure 63. Installing a new optical drive
8. Connect the signal cable and the power cable to the rear of the optical drive.
9. Go to "Completing the parts replacement" on page 115.
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Hardware Maintenance Manual