Change WordPress multisite to sub-folder installation

I have an existing sub-folder based WordPress multisite that I would like to change so that the WordPress core files are stored in a sub-folder, but my URL stays the same. I’m following the instructions here:

https://wordpress.org/support/article/giving-wordpress-its-own-directory/#method-ii-with-url-change

But for Multisite, there is nowhere I can find in the Dashboard to change “WordPress address (URL)” or “Site address (URL)”, i.e., steps 3 and 4. I would prefer to do this via “Method II” as outlined on this page.

Can I simply just go into phpMyAdmin and manually update the relevant db fields for these steps and follow the rest of the instructions as is? And if so, what would be the relevant db fields I would change?