Kind of a really late answer here. I fixed this MacBook a couple years later when I was less of a dumb kid. I used a boardview file and schematic to track where the voltage was on the board and found that one of the through holes on the one wire circuit was corroded through due to moisture getting inside through the fan vent. I ran a jumper wire between the two chips to fix it. I have absolutely no clue how I didn’t fry those mosfets or something else in my stupidity but it’s been working since around 2020.