Installing AUX on Original Blaupunkt RD4 N1 Radio in Peugeot 207 2007: Guidance Needed

Hello, this is edit the previous topic.
I have a Peugeot 207 car from 2007. It has the original radio - Blaupunkt RD4 N1 -.
I read a lot of topics on the forum, but I did not find a satisfactory answer.
A lot of people wrote to order such a cable http://allegro.pl/zlacze-aux-1-5m-rd4-peugeot-rd4-207-307-407-607-80-i6510930895.html. And connect it instead of the CD stations on the radio in the back.
I also found this video - https://www.youtube.com/watch?v=QROwHI7-h8s&list=WL&index=4 and this product that seems credible BUT I can not find where it can be ordered and this is probably not possible on this site. (besides, it will probably amount to over PLN 150 + shipment from abroad, and I prefer a cheaper solution). -product http://www.connects2.co.uk/Product/ProductItem/CTVPGX011.
Thank you in advance for your help.

It's best to buy the original and after the trouble

We have not understood, I want to buy a non-original radio for peugeot because in ORIGINAL there is no AUX input. And how do I buy not original from AUX, will I be able to control the radio and computer with this joystick on the steering wheel?

probably not unless you have a lot of knowledge about electronics

EDIT: THEME

fuspepro wrote:

because in ORIGINAL there is no AUX input.

Then activate them and + AUX wire after the robot.

I am looking for people who have had a similar problem. And answers in the style - "just do it" do not help if you do not explain in detail what to do. Is the cable alone enough?