I need help! I'm trying to install a RCA adapter to my car stereo so I can hookup an amplifier and speakers on my 2016 Nissan Sentra S car but I can't find a stereo wiring diagram so I'm not sure which wires are which
I would look for a plug and play wiring harness to fit your needs. Also, have you considered using the rear speaker for your sound input? There are demonstrations on youtube.
Just a suggestion.