Ok so got in the garage tonight and worked on this a bit more. I started with the fuses and took out 20,21,22 like you said and tried the voltage test again. I'm still getting 12v coming thru though with the fuses out on the yellow/black wire at the ignition
Here's a picture of the fuse box, I took out the 3 at the top left:
So I took a picture of the alternator connections just incase they're wrong..
