I have 3.5mm aux in slot in my car.

The car manual says 6620 is compatible with the car.

I want to know how to connect 3.5mm cable with 6620? 3.5mm is too thick to go into any 6620 slot. Is there a cable that converts 3.5mm to a thin end cable that can get into 6620??

Thanks

Try to help : I think your phone comes with a 2,5mm , 4 pole connector ? (check the plug of the headset) . In this case you need a 2,5 - 3,5 mm / 4 pole adaptor .
Tip for advanced music/sound/phonecalls management : the new Nokia N86 comes with a headset in two parts (AD54 + HS83) . You can buy the AD54 to connect to the Phone . The "box" on the end of the AD54 cable holds management for music + phonecalls and a connector for any 3,5 mm plug , also for your aux plug ! It includes a microphone as well . Now you can listen to music and answer your phonecalls over the carradio , whithout touching the phone .
Also Sony has a headset like this . I think it's the EX71SHS , with 2,5mm plug .

:) Regards jApi NL