Dell PowerEdge 2550 Rack Installation Instructions page 37

Attach the input/output (I/O) cables to their respective expansion cards on the back of
4
the system.
NOTE: If your kit does not have a strain-relief bracket, skip to step 6.
Install the strain-relief bracket to the back of the system (see Figure 1-23):
5
Thread the I/O cables you connected in step 4 through the slots of the strain-relief
a
bracket.
Insert the ends of the four long portions of the strain-relief bracket into the four
b
matching holes beside the hinge bracket.
Secure the captive thumbscrew to the back of the system.
c
F i g u r e 1 - 2 4 . A t t a c h i n g t h e S t r a i n R e l i e f B r a c k e t
bracket inserted
into four holes
strain-relief
bracket
Velcro strap
cables to
expansion
cards
captive
thumbscrew
Ra c k In s ta l lati on Gui de
1-31