2015 Buick encore head unit wiring diagram

[redashtray]

I was trying to add a LOC to my 2015 encore and when I unplugged the harness from the back of my original head unit I cut the wires to try and find the rear speakers and never was able to find the speakers so I was connecting the head unit back up and I have several extra wires that I don't know where they go is there anyway I can find a wiring diagram for the 26 wire pin that comes out of the back