niotrio

Hi all, I recently got a stripped out 350z and I am looking to install the OEM speakers and amp that I purchased separately. The door speakers were already there so I don't need to install them however the speakers in the back, sub woofer and amp need to be installed. There are several wires that have been cut except the wires for the speakers themselves which I have been able to connect. I have been looking on the forums and various YouTube videos to see if I could find a guide on how to do this but unfortunately haven't been able to do so. I have attached some images that describe the situation and parts that I have that hopefully can be installed. If anyone could help or advise that would be much appreciated.