Custom Class spells are not showing up in spell books

I’ve create SoulWeaver class, and I did create bunch of spells that would be fitting for SoulWeaver class. So, I wanted to add those custom Spell to my character sheet in any World I choose, but those custom spells did not appear in Spellbook. I’ve noticed that there is “SoulWeaver Spells” option next to “Known Spells” even though custom spell did not have option that let me specifying what spell is for. Perhaps introduce us with new feature that allow us to specifying what spells we want to use for certain class in a way we can use them in general world?