It's not intuitive. I have to guess a little bit every time I do it.
Do the normal "url" button with the text you want to hyperlink in the brackets and an equal sign after the url with the website after the equal sign.
Por ejemplo, if you want to say:
"
Butt seepage is hardly dinner conversation, Judith."
You enter:
"[url = https://en.wikipedia.org/wiki/American_Horror_Story]Butt seepage[/url] is hardly dinner conversation, Judith" without the spaces.
Sometimes I spice it up by making the link bold:
"
Butt seepage is hardly dinner conversation, Judith."