3.Attach one front-mount rail to one rear-mount rail. Make sure the rails are mounted back to back, as shown in Figure 7. Depending on rack depth, use either three or four 8-32 x 0.375-inch Phillips truss head screws for each rail set. Leave the screws loose until step 10.
(4) SCREWS 8-32 X 0.375 PHILLIPS TRUSS HEAD
Figure 7. Assembling a Support Rail
4.Repeat step 3 for the other rail set.
5.If you are installing the unit into a square-hole rack: Insert 14 cage nuts into the square-hole rack as shown in Figure 8. Align the bottom cage nuts on the front racks with the bottom cage nuts on the rear racks. Then align the top cage nuts with the front racks (refer to Figure 8).
CAGE NUT 
CAGE NUT 
ALIGN
ALIGN
FRONT-MOUNT RACK | REAR-MOUNT RACK |
Figure 8. Inserting Cage Nuts
