pdxguy

I want to add aux in my car , i have rca to aux cable , but I don't know how to connect to stereo? I want to have stock steroe. I heard of harness to rca , but thats for connecting a aftermarket steroe, do they sell the cd changer harness only for rca? because i only saw the two plug in harness , Im looking for a cheap way to add aux . I'm thinking if I cut the cd changer harness and find out which wires go where and add the rca cable to harness. but I'm 17 and dont want to mess anything up, like have a circuit. Let me know how you guys got aux in your cars.