Hi.
So, I connected the wiring using butt splices by referencing these two things:
subaru - https://www.surrealmirage.com/vrg3/bcstereo/
sony - https://cimg9.ibsrv.net/gimg/rennlist.com-vbulletin/1602x1274/capture_d_cran_le_2021_06_07_22_40_57_118d1aaf63cda9e3b3c45406d48216d33e8d27ff.png
Left...