Dell OptiPlex 790 (Early 2011) - Manual (Page 26)

8. Remove the speaker from the chassis.
Installing The Speaker
1. Place the speaker on the appropriate location of the chassis rear.
2. Press the speaker-securing tab and slide the speaker towards the left of
the computer to secure it.
3. Thread the internal speaker cable into the fan shelter clip.
4. Connect the speaker cable to the system board.
5. Install the drive cage .
6. Install the front bezel .
7. Install the cover .
8. Follow the procedures in After Working Inside Your Computer .
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