Dell OptiPlex 5000 Small Form Factor Service Manual page 54

Steps
1. Push and remove the antenna cover from the chassis using a screwdriver.
NOTE: This step is only applicable when the system is being upgraded to have an external WLAN antenna.
2. Route the antenna cables through the routing guides on the system board.
3. Push the antenna-modules in to the slot on the back panel of the chassis.
4. Install the nut and washer to secure the antenna-modules to the chassis.
Next steps
1. Install the hard-drive and optical-drive
2. Install the WLAN card.
3. Install the 3.5-inch hard-drive.
4. Install the 2.5-inch hard-drive.
5. Install the front bezel.
6. Install the side cover.
7. Follow the procedure in
54 Removing and installing components
cage.
after working inside your computer.