Dell PowerEdge 2420 Guide D'installation page 27

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 1-15).
3 Slide the cable slot cover in the open position towards the front
of the rack.
4 After routing your cables through the top of the rack, close any air gap
in the cable slot by pulling the slot cover towards the back of the rack.
Use the wingnuts to secure the cover.
Figure 1-15. Opening and Closing the Cable Slot
1 cable slot cover 2 wingnut (2)
Installation Guide
1
2
25