Cisco 4200 Series Hardware Installation Manual page 58

Rack-Mount the Chassis Using Slide Rails
Figure 35: Attach the Slide-Rail Locking Bracket to the Side of the Chassis
1 Chassis
3 8-32 x 0.302-inch Phillips screws (three per side)
Step 2 (Optional) Attach the cable management bracket to the slide-rail locking bracket:
a) Install the cable management screws into the slide-rail locking bracket.
Cisco Secure Firewall 4200 Series Hardware Installation Guide
54
2 Slide-rail locking bracket
Mount the Chassis