Fujitsu PRIMERGY TX2550 M4 Upgrade And Maintenance Manual page 299

Expansion cards and backup units
Figure 205: Latching the locking bail
Ê Carefully fold up and latch the locking bail.
Figure 206: Installing the protective cap
Ê If the SFP+ transceiver module is not immediately connected to an LC
connector, attach the protective cap to the SFP+ transceiver module.
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TX2550 M4 Upgrade and Maintenance Manual