Extra aerial socket on newer RNS510 Columbus?

[Prstu]

My 2014 Superb has an older RNS510 Columbus fitted than came originally (HW03). In the dash I see I have an extra aerial type wire with nowhere to go. But on pictures online I see the newer RNS have an extra socket for this towards the top of the unit crudely circled in the picture.

 

Anyone know what this is?

 

thanks

 

 

[langers2k]

It's a DAB connector

 

[Prstu]

Thanks