Updating Multi-value Reference Fields

I searched for info on this before posting here but I couldn’t find anything.

I’d there a way to connect a multi-value reference field to some kind of user input control and update a database record with the selected values?

https://support.wix.com/en/article/working-with-multiple-item-reference-fields
https://support.wix.com/en/article/displaying-content-from-multiple-database-collections-using-reference-fields-4034931#displaying-information-from-more-than-one-collection