Highline navigation system for radio exchange at 75 where I get an adapter from

Hello, my newly bought 75 has the high-line known navigation system with TV function, which I would like to exchange for a commercial radio with ISO plug to be able to hear a bit of Lala. On my radio is the radio function deffect, which is not displayed at all on the display you can hear no music and so on, Navi itself works. I have the unit once developed only the 2 very special plugs where I found so far no adapter In order to connect a standard radio, there is not even an antenna cable available. Although this is rather the smaller problem could live up to a seperate radio antenna. I need quasi an adapter from the connections see picture on ISO plug, only where do I get such a thing ? p.s. knows someone whether on one of the plugs directly the speakers are controlled, or do they also run over anything that sits in the back trunk ? If the over the one plug directly You might be able to patch up an iso plug, from which others only + pick up and install a separate antenna and you should be able to listen to music. mdf Overroller