Figure 23. Installing the front mounting bracket to the EIA flangeNote: Make sure the rail stays horizontal.① Open the front bracket and align the front end of the outer rail to the EIA flange.② Pull the outer rail into the EIA flange until the pins are inserted into the corresponding holes.③ Close the front bracket to secure the rail.Step 8. Repeat the previous two steps to install the left outer rail to the upper EIA flange.Step 9. (Optional) If you need to ship the rack cabinet with the enclosures installed or place the rackcabinet in a vibration-prone area, install two M6 screws into the mounting flanges between the tworear pins on both sides.Figure 24. Installing the rear screwsStep 10. Rotate the E2 enclosure clockwise so that the right side is facing down.Chapter 6. Installing optional kits 23