There are a few lines regarding AP authority, I believe in the aircraft.cfg. If you can’t find it there, just do some searching through all the CFG files in the otter directory. Use notepad++.
The AP files will be clearly labeled, and with some trial and error it’ll be easy to figure out. I’m in my office today so I can’t check for you, but when I get some time I’ll poke around and get back to you.