Dell EMC XC Core XC7525 Installation And Service Manual page 121

Steps
1. Align the connectors and slots on the LOM card or rear I/O board with the connector and standoffs on the system board.
2. Press the LOM card or rear I/O board until firmly seated on the system board connector.
3. Using a Phillips #2 screwdriver, secure the LOM card or rear I/O board to the system board with screws.
Figure 122. Installing the LOM card and rear I/O board
Next steps
1. Install the system board.
2. Follow the procedure listed in After working inside your system.
Installing and removing system components 121