Oh, man, I just found out how to do this and it was right in front of my all the time. One just simply has to drop html including shortcode into “Add HTML before event content”. Perfect. It doesn’t matter what you set which page default to (which didn’t work anyway, but I’ve never tried the selections before, so cheers. But it’s good to know that both plugins are necessary. Was that somewhere in the documentation and I missed it?
Yes, it all helped.