n.t.apostolidis

Hi

Could you please explain me the difference of these 3 mutes?
I'm trying to connect a bluetooth Dension and I see that point 2 (on the diagram) is already by... I don't know what the previous owner had done but I guess it has to do with the phone holder that is installed in my Audi TT mk1.

Shall i try to take that cable out of point 2 and insert the Dension one?
Or shall i put the Dension in point 3?

Thank you