Scottish B Teams

Wonder if anyone is able to help. I want to restructure scottish football and put rangers and celtic in the english leagues (Thats the easy part). How do I create B teams for Scotlands Top tier teams..? I want a B team for Rangers and Celtic in the scottish leagues while the main team plays in England.

I also want B teams for the next best teams in scotland.. That would be Aberdeen and whoever else has a decent reputation.

I have tried creating new teams in the editor and making the affiliation as B team but they dont appear in the development section.

Anyone able to help?