Keg,
I know the 'base training' circuit diagram you refer to, however I never flew square base either on the line or in the sim.
20 deg AoB xwind turn (nil wind), adjust tracking on downwind, 15 deg AoB on base (initially), adjusted as necessary for headwind/tailwind. Airbus similar except more like 15 deg AoB xwind, 10 deg on base.
Definitely not a square base unless I'd stuffed it!
VS.