During my prewiring of my radio I noticed that it has a RS232 connection on pin 3,10, and 11. My plane has a PSE8000B audio panel and Dynon D180, D100, HS34, GNS430W. Also has the SL40 as #2 com. Does this connection need to be used? As I understand it it is used for inputting frequency and function control commands and outputting transceiver status. I don't believe that the dynon nor the other systems have a use for it. Am I wrong? Does the Dynon's display or able to dial the freq. for the com's?