Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
Figure 4-25 Determining hole positions
Step 2 Drill holes using a hammer drill, as shown in Figure 4-26.
Figure 4-26 Drilling holes (unit: mm)
Step 3 Align the rear panel with the hole positions, insert M12x40 bolts (expansion bolts without
expansion sleeves) into the holes through the rear panel, secure them using the shipped
stainless steel nuts and flat washers, and tighten the bolts to a torque of 45 N·m using a torque
wrench, as shown in Figure 4-27.