Dell PowerEdge 2550 Rack Installation Instructions page 36

Installing the Cable-Management Arm
Facing the back of the rack cabinet, locate the threaded hole on the back of the slide
1
assembly and secure the end of the cable-management arm (the end having a bracket
and thumbscrew) to the right side vertical rail (see Figure 1-22).
The bracket snaps into the square mounting holes on the vertical rail and is secured
with the captive thumbscrew.
F i g u r e 1 - 2 3 . I n s t a l l i n g t h e C a b l e M a n a g e m e n t A r m
Align the free end of the cable-management arm (the end with the half-hinge) to the
2
hinge-half mate on the back-right side (as viewed from the back) of the system.
Squeeze the quick-disconnect knobs on the free end of the cable-management arm
3
and align the two hinge halves to attach the arm to the bracket on the back of the
system chassis (see Figure 1-22).
1-30 Rac k I n st allat io n G uide
quick-disconnect knobs
captive
thumbscrew