The Central Box 210/220 Flush Mount is designed to cleanly secure the Central Box to the equipment tray. The Central Box is secured to the mount using the (4) M2 screws provided. The mount can be secured to the equipment tray with adhesive or the provided screws. Use the included template to mark the cutout in your equipment tray. This is a close-tolerance fit. Use caution when cutting the opening. You can also use the template for reinforcement under the tray if the tray is not strong enough.