I am installing a powered subwoofer in my car for a little extra bass. I am looking for the correct wiring diagram for my car specifically. I don’t want to have to take the panels off and such as my experience from the past installs I have done on other vehicles the door paneling pins break easily and I don’t want to take that chance or even the panel breaking. Also does my stereo which is the factory small touch screen with the backup camera and SiriusXM have RCA hook ups that I can hook into instead of splicing in my rear speakers. I’m new to the Kia scene but love my new Optima and look forward to buying another. Thanks.