Dell OptiPlex 790 (Early 2011) - Manual (Page 24)

7. Release the latch and rotate the speaker.
8. Remove the speaker from the chassis.
Installing The Internal Speaker
1. Place the speaker on the appropriate location of the chassis rear and
rotate until the latch is secured in place.
2. Route the speaker cable beneath the system fan cable and wireless local
area network (WLAN) antennae (if installed).
3. Connect the speaker cable to the system board.
4. Install the drive cage .
5. Install the front bezel .
6. Install the cover .
7. Follow the procedures in After Working Inside Your Computer .
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