NEC ux5000 Hardware Manual page 73

Chapter 1 - Installing the Chassis
5. For 2 Chassis: Slide Bracket B under Bracket C and attach the brackets to the side of the Chassis-A
using 2 screws into the chassis and 2 into Bracket B. Repeat this process on the opposite side.
Figure 1-81: SECURING BRACKETS FOR 2 CHASSIS
Chapter 1 1 - 61