Dell PowerEdge 4220 Guide D'installation page 31

Figure 1-16. Cable-Routing Options
1 cable raceway
3 cable clips
5 bottom cable exit
Opening and Closing the Top Cable Slot
The top cable slot in the rack can be used for routing cables up to a cable raceway.
1 Open the back doors.
2 Loosen the wingnuts underneath the cable slot cover (see Figure 1-17).
2 top cable slot
4 PDU channels (2 per side)
Installation Guide
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