So I have an after market stereo in my z3. The radio has a setting that says aux 1. I’m wishfully assuming that the last owner installed an aux with the radio. I found an aux cord that goes to rear panel in the back of the center consul (where are the automatic top button is), but it doesn’t look like it’s going to Anything. I was wondering if anyone knows what this cord is and good places to check for an aux cord or an six cord hookup. I’ve attached a photo of the panel. 
