Hello folks. Thanks first of all for any help.

I´m trying to add an AUX plug on my RCD 300, I bough from ebay: AUX Schalter Plug + Kabel für VW autouadio RCD510 RCD310 RNS315 POLO Passat Golf | eBay

After Coding the Radio to accept AUX connectors with VCDS it should theoretically play music from my Cellphone If I press two times the "CD" button (Going on iPod or AUX mode :/). After plugin everything, well it didn´t work .
I noticed the eBay adaptors are for an RCD310 radio and not RCD300. Meaning I need to change the pins order.

Now the problem: I jus´t cant figure out in which pin I need to plug my 3 Aux Cables. I found this RCD 300 Diagram: https://i.ytimg.com/vi/760HEmMF3ns/maxresdefault.jpg

I tried already using pins 1,3,5 and didn´t work so I tried using the CD Changer 2,9,7 ( for Ground). I´m trying to figure out what settings I should use to be able to use my Aux connector. I know There is an OEM connector with the right pins order.

Could any one help me figure out ? THx