Fujitsu PRIMERGY TX100 S3 Maintenance Manual page 311

Figure 213: Installing the system board (B)
Ê Carefully shift the system board towards the server rear until the plug shells
engage with the cut-outs in the connector panel (1).
Ê Lower the system board onto the centering bolts (2).
Ensure that the system board is properly seated on both centering bolts.
TX100 S3
Upgrade and Maintenance Manual
System board and components
311