thanks for the photo; that's generously sized nesting boxes you have there, so if they were mine, I'd be inclined to leave them alone. If your broody/ies behave like mine have, they get more protective as time goes on, and especially when they get cues from the developing eggs that babies are coming (movement, even cheeps near the end of incubation).
Looking ahead, be aware that the chicks will not be able to get back up once they hatch (I wouldn't worry about them falling out or getting down; they weigh very little and are quite rubbery) so you might think about where to prepare a nesting area on the floor.
Looking ahead, be aware that the chicks will not be able to get back up once they hatch (I wouldn't worry about them falling out or getting down; they weigh very little and are quite rubbery) so you might think about where to prepare a nesting area on the floor.