Re-theme, or maybe just remove the visual references to child slavery?
Granted, the kids-in-cages angle is part of the plot. Not necessarily its bedrock, as the problematic aspects of Song of the South are, but somewhere between that and Pirates -- which had the benefit of being a ride with questionable elements before becoming a movie with more modern sensibilities and a ride with notably fewer questionable elements.
Others can (will) argue about these distinctions...
My only other thought is on the notion that changing the ride will destroy the original story. In the original Pinocchio story, he kills the cricket with a hammer and multiple animal characters get badly maimed, some of which try to murder him by hanging him from a tree. He burns both of his own feet off at one point. Disney saw fit to edit that story, making some odd additions in the process; removing the kids in cages is topically wise and actually is in the same spirit as Disney's original edits, making an older story with some problems a better fit for modern times.
Not aiming any of this at you,
@Jahrules. Just noting options, I suppose.
Anyway.