Fujitsu PRIMERGY RX2520 M5 Upgrade And Maintenance Manual page 144

Hard disk drive (HDD) / solid state disk (SSD)
Figure 56: Installing the 3.5-inch HDD backplane (A)
▶ At a slight angle install the backplane between the punching and the
centering pin (1).
Take care that the OOB connector will not be damaged! (2)
▶ Fold back the backplane (3).
144 Upgrade and Maintenance Manual RX2520 M5