Fujitsu PRIMERGY CX2550 M6 Upgrade And Maintenance Manual page 206

Liquid cooling (LC)
Figure 141: Installing the LC kit (D)
▶ Fasten the LC kit with four screws on the system board (see circles).
Figure 142: Installing the LC kit (E)
▶ Secure the DIMM memory module heat sinks on both sides with the four
clamps (see circles).
Note when securing the DIMM memory module heat sinks:
206 Upgrade and Maintenance Manual