Figure 3: Mounting Positions; Figure 4: Installing The Support Bracket - Cisco C880 M4 Operating Manual

Installation
Mounting positions
The following picture shows the mounting positions, screws and cage nuts of
two subsystems one upon the other in a Rack.
rear left**
Legend
*: height units (U) counted starting from the bottom line of the subsystem
**: "rear left" and "rear right": seen from the rear side of the rack
"front left" and "front right": seen from the front side of the rack
: M5 cage nut
M5 screw with centering washer ("mounting spring")
:
: Tapered mounting bolts at the rear rail ends

Figure 3: Mounting positions

For mounting the left sliding rail the support bracket must first be mounted
on the rear left support upright. The bracket must be mounted level with the
lower edge of the device.

Figure 4: Installing the support bracket

Cisco C880 M4 Storage Subsystem Operating Manual for Server with E7-8800 v3 CPU
Installing the Storage Subsystem in the Rack
rear right** (with support bracket) front left** front right**
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