Loading the contact pins of the plug connector on the CD changer (Skoda Fabia 5J)

1 - "data CD out" (into a car radio); 2 - "CD-CLOCK out" (into a car radio); 3 - CD "mass"; 4 - "data CD in" (from a car radio); 5 - not busy; 6 - 12V voltage supply (from a car radio); 7 - right channel +; 8 - positive pole terminal included (from a car radio); 9 - signal ground; 10 - left channel +; 11 - not busy; 12 - not busy