Dell OptiPlex Small Form Factor Plus 7020 Owner's Manual page 98

Prerequisites
If you are replacing a component, remove the existing component before performing the installation procedure.
About this task
The following images indicate the location of the serial module and provide a visual representation of the installation procedure.
Figure 55. Installing the serial module
Steps
1. Using a screwdriver, remove the serial module cover from the chassis.
NOTE: This step is applicable only when the serial module is installed for the first time.
NOTE: To remove the optional-module cover, insert a flat-head screwdriver in the hole of the cover, push the cover to
release it, and then lift the cover off the chassis .
2. Connect the serial-module cable to its connector (KB MS, SERIAL) on the system board
3. Insert the serial module into the slot on the chassis.
4. Replace the two screws (M3) that secure the serial module to the chassis.
Next steps
1. Install the processor fan and heat-sink
2. Install the disk-drive cage.
3. Install the 3.5-inch hard
4. Install the front bezel.
5. Install the side cover.
98 Removing and installing Field Replaceable Units (FRUs)
assembly.
drive, if applicable.