IBM x3100 M5 Type 5457 Installation And Service Manual page 335

Figure 239. System board installation for 4U server model with non-hot-swap power supplies
5. Gently push the system board by the side nearest to the fan cage to insert the
external input/output connectors into their respective holes in the chassis.
Figure 240. Pushing external input/output connectors into chassis for 4U server model with
non-hot-swap power supplies
Attention: When inserting the system board external input/output
connectors into their respective holes in the chassis, make sure the EMC
springs are not inserted into the holes. Inserting the EMC springs into the
holes in the chassis could damage the EMC springs.
Standoffs
Chapter 6. Removing and replacing components
319