A central interface for units on a flight simulator is a unified control panel or dashboard that integrates various flight systems and modules into one cohesive display. It provides pilots or users with real-time information on critical flight parameters such as altitude, speed, heading, fuel levels, navigation, and aircraft status. The interface allows for efficient management of different systems (e.g., autopilot, communication, instruments) while offering intuitive access to key functions, often with customizable settings for different flight scenarios. To use any of the panels you will need to have the correct central interface system. But this is only a once off purchase as you can use it for the different units specified in the table in the image.