I have a 2001 s430 that i'm trying to add a cd changer. From what Ive read it should be simple. I having located what seems to be the corret 3 prong wire but it is either tied down or to short to plug into the changer. I have not located what i think is the fiber optic. What does it look like? Might I have to remove the amp to see what is behind there?

Install Help please!