Adding Bluetooth to mk7 pre face lift van

[Jhobbs25]

Hi I'm looking to add bluetooth to my mk7 pre face lift van, I've remkved my stereo and only have one plug in the back, when I look at all the bluetooth radios they have 2 plugs does anyone know if this can be done? 

Obviously I'll have to buy all the wiring looms, modules and stuff but how do I go about the extra plug? 

 

Thanks Joe