sc-bee, If I understand your question correctly, you are thinking there is comb in the cage. There is not, just a larger cage for the queen to move around in until you release her. You remove one frame and drop this in. I made one "just in case" and used it one time for a new queen introduction just playing around with it. When I lifted it out, you could tell the bees on the outside were feeding her instead of biting at her.
If I misunderstood, sorry. I'm sure someone will answer that does.