Fujitsu PRIMERGY TX2550 M4 Upgrade And Maintenance Manual page 277

Ê Push the SAS expander board holder in the direction of the arrow until it
stops on the two hooks (see close-up).
Figure 189: Installing the SAS expander board holder
Ê Fasten the SAS expander board holder with one screw M3 x 4.5 mm (see
circle).
TX2550 M4
Hard disk drive (HDD) / solid state drive (SSD)
Upgrade and Maintenance Manual
277