Player would be controlling one gun and AI would be controlling the 2nd one. AI controlled AAA will aim at the same place as player’s AAA (a bit like multi turret tanks). Player would be able to “lock on” an enemy aircraft so AI can get the distance right (or make it autodetect like in case of lead marker).
It would be a soft buff for AAA (as you would have 2 guns instead of one) and it would make manning it with AI somewhat useful.