Fujitsu PRIMERGY RX2530 M6 Upgrade And Maintenance Manual page 301

Liquid cooling (LC)
▶ Remove the cable clip (see circle).
▶ Remove the protective caps.
Figure 208: Removing the slot bracket with tubes
▶ Remove the slot bracket with the tubes.
▶ Disconnect the two control cables from the system board, see
Figure 205.
Figure 209: Removing the LC heat sink (A)
RX2530 M6 Upgrade and Maintenance Manual 301