Fujitsu PRIMERGY TX140 S1 Upgrade And Maintenance Manual page 288

Expansion cards and backup units
Ê If the SFP+ transceiver module is not immediately connected to an LC
connector, attach the protective optical port plug to the transceiver optical
bores.
Installing the secondary SFP+ transceiver module
Figure 158: Installing the secondary SFP+ transceiver module
Ê If applicable, install the secondary SFP+ transceiver module accordingly.
288 Upgrade and Maintenance Manual
TX140 S1