How to introduce other chicks to other hens

[HoneysuckleHomestead]

I had a broody polish mama hatch out 4 babies. They're currently about 2 weeks old. Coop is an enclosed run with ladder up to coop box. When broody mama got to "lockdown", we blocked off the top of the ladder so she could have some privacy in the coop box, leaving 2 other polish hens exiled to the run (with necessary amenities, of course). How (and when) do I introduce the chicks to the other 2 mamas. Should I let the other hens go up top to check them out? Or do I let the babies jump to the bottom? Should I wait a few weeks? What would you recommend?

 

[50-45-1]

I dont believe it was necessary to close them out in the first place.
Most every broody will protect her chicks and keep them safe from other chickens.
What you will have a problem with is the ramp. Chicks often can not figure out how a ramp works and go off the side. Then cant figure out how to get back up and become stranded underneith.
Just observe the hens reaction to your broody for a while, but usually there is no problems.
Good luck!