I came across your query by chance and couldn't resist answering, even though this forum echoes with dusty silence.
What size of holes did you make? At the most, slits are recommended. Holes are likely to allow bees to meet each other too quickly, with consequent fighting.
I have never used slits or holes, just bung the paper down and let them get on with it. The method has failed ne onluy once, when I did a late-season unite; the bees were more intent on contracting the two nests than exploring each other. After a week I took the paper out and told them to get on with it. They did.
Let us see whether this pigeon reaches you.