The history starts here. I want to upgrade a USB port to the original Perfomance radio. At Ebay many different adapters are offered, which allow one. I have upgraded my radio to watch which is installed with me. (by which numbers can you recognize this?) On my request for an adapter a salesman wrote that it is not possible, because the radio has a light-guide input. (two orange cables on the edge) But where do you find an adapter? Do they both go?? What now? I haven’t seen any USB adapters with a Lichleiter cable yet. I am grateful for any help.