peugeot 407 aux input

I'm murat. I'm a student and I'm 23 years old. Although I am not very sensitive about the car, I am very fond of music. They say there is an aux output in the 407s. Even if not, I want to get it installed. I called the service, insert the radio and open the original connection from behind. Does anyone have any ideas? my car is 2007 model.

Thank you for your interest..