Fujitsu PRIMERGY CX400 M4 Operating Manual page 53

Starting up
Ê Move the left rail towards the front side (4) while holding the positioning clip
(3). The mounting aid must lock in the corresponding hole.
Ê Release the positioning clip (5) after the designated position is reached.
Figure 19: Tightening the M5 screw
Ê Tighten the M5 screw (6) on the front side of the rail.
Ê Repeat this procedure to install the right rail.
Operating Manual 53
CX400 M4