Dell PowerEdge Rack Enclosure 4220 - Manual (Page 3)

5 Install the coupling brackets.
a Position the two racks side by side.
b Adjust the leveling feet on both racks so that the racks are parallel and in
the same horizontal plane. For instructions, see "Adjusting the Leveling
Feet" in your rack installation guide.
c Install the four coupling brackets on the racks (two on the top and two
on the bottom) as shown in Figure 1-3.
Hook the brackets into the square holes inside and adjacent to the rack
posts, and tighten the brackets using the wing nuts (see Figure 1-3).
Figure 1-3. Coupling Two Racks
1 coupling bracket locations 2 wing nut
3 coupling bracket (4)
1
3
2