I created a pretty rough, but hopefully still usable, help page for manually inputting and moving Authority control metadata from Wikipedia to Wikidata for new pages that have no associated Wikidata item.
Wasn't sure if it is okay to create a page on Wikidata, but I followed the Be Bold! mantra and just went for it.
And again this is not the most elegant solution, but I wanted there to be some sort of graphic documentation on how to update Authority Control.
Best,