Safari password help

I have Safari / iCloud saving my login / passwords. It works well across devices and I am using it a lot lately.

When I originally set it up and started using it, there were some sites that I told iCloud to NOT save the login info - at the time the passwords were not as complicated as I have been making them lately. I would now like to have these passwords saved in Safari / iCloud passwords due to the complexity of these passwords.

How do I tell Safari to save a password for a site I previously told it I did not want the password saved for??