There’s loads of ways to do splits. I went with one of the most simple ways - into a nuc box I had from purchasing my initial colony.
Being able to see the bottom of the frames is a good first check for queen cells but in my case they had built them on the face of the comb, none were hanging from the bottom of the frames. Normally this is interpreted to mean they are emergency or supercedure queen cells but based on advice from this site and reading on the web, I’m very confident they were swarm cells.
The thread for my appeal for help is here…