So, I’m sure this question has been asked but when I searched I couldn’t find a clear answer. What I want to do is add an auxiliary audio port to play my iPhone through the factory radio. I have seen several aftermarket interfaces but they all talk about plugging into the CD changer port. I have the CD player with the built-in six disk changer. I also have the factory DVD and headphones system as well as steering wheel controls that I do not want to lose by putting in an aftermarket head unit. I have included a photo of the radio that I have in case there are any questions about it.