If it is drawn comb in the super, no problem, with undrawn foundation a frame or two of brood above the exclude will get them moving. Open brood would be better than capped. Check for queen cells before you put the frames back down.
Easy if you have same size brood and supers, if not you have to get a bit creative.
Do the frames in the top super or box have comb or foundation? I am doing the same thing and not using any brood in the top super. I have placed an Emrie shim above the excluder. The bees will not move up until the bottom brood box is covered by about 80%. Our coll rainy weather is causing everything to slow down substantially or at least that has been my experience here.
Two medium supers of foundation with one rank on both in the middle empty for a frame of eggs and larvae will get the bees working in your supers above the excluder. Jiggle shake the bees off first to prevent moving the queen above the excluder.
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