yeah, i havent removed my radio yet....i think once you remove it...things will be more clear. However, based on OPs comment....you need a new 12 pin connector set, cuz it comes with blank pins so u can connect your aux cable. (thats the one I bought from ebay uk).

But I also bought the audi repair wires, which already have wires connected to pins. Which means, half the work is already done and all you need to do is insert these wires through the 12 pin connector which will go into the back of the radio. I think youve got it right.

Either methods should work IMO.

I also read, u can fabricate removal keys using hanging file folders on some site, but if youve already ordered them, u rather wait. Ive had my parts since 2 weeks, just been lazy to go under the car.