Is there any way to add a 3.5 mm input jack?

Is there any way to add a 3.5 mm input jack?

I recently got a new clock radio to replace my old Audiovox from 2012, and upon doing general repairs, went to plug in my new Samsung to test the jack, and realized that it was only output. Oof. However, 3 of the wires in the ribbon cable for the 30 pin dock correspond to the parts of an Auxiliary input cable, so does anyone have a pinout of what each wire is? I would love to know so I can put this jack in.

ANSWERS: