2017 xlt 8” touchscreen w/nav, sync, apple car play... I want to add a amp and sub. Seen a lot of videos with plug n play harness so I can add rca’s. Which one do y’all recommend? I have factory speakers and I don’t wanna mess with them yet, I don’t think I have the amplified system. I don’t really wanna pull apart the dash and screen. Can I just get a line out converter, splice it into one of the rear door speaker wire and go from there? Where are y’all getting your remote signal from?