Lenovo ThinkStation P720 Hardware Maintenance Manual page 112

4. To install an optical drive, do the following:
a. If you are installing an optical drive into a flex bay with a plastic shield installed, press the clip as
shown to remove the plastic shield. If there is a metal static shield installed in the flex bay, remove
the metal static shield.
Figure 13. Removing the plastic shield in the flex bay
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P720 Hardware Maintenance Manual