http to https – URLs in wp_posts

Hallo,

I switched a site from http to https, everything works and seem to be fine, also the ssl test was good. But when I run the http URL against the https one with the plugin, I still get e.g. WP_posts 194 URLs that I should change.
Since I think everything is fine, I would like to know where these URLs are located, to determine if a change is needed.

Does anyone know where I can see the specific URL? Who would let a plugin change URLs or content without knowing where they are located. (Or am I getting the whole thing wrong?)

Thanks in advance!