Hi Michael,
the autopilot will supersede the flight-director - but the question is - if AP A is in command, but FD switch A is off - will there be a MA light on the left side? I think so.
So maybe the logic is like this: Whenever any FD switch is on, there will be a MA light.
If an AP is in CMD, then the MA light will be on that side, even if that side FD switch is off.
If no AP is in CMD then the MA light will be on the side of the FD switch that is on AND was switched on first.
So your second row would be:
.... B Master .... A+B Master
third row:
... A Master .... A+ B Master
Jan