2020 sierra at4 stereo wiring pin out help

[Silverado0618]

I went to dealership and got the X1 and X2 pinout for my Bose amplifier. however when i look behind the seat the pinout colors don't match what I see on the amplifier. I am looking to add a dsp after Bose amplifier and don't need to spend the $240 at llj customs for a harness when I can make one. I just need to know which wires are what. I am wondering if anyone on this site has done this before or have the right schematics or pinouts for the speakers. Appreciate any help I can get.

 

Thanks