First, go the">Access Info page.

Click on the database you want.

When the database search field opens, copy that URL.

Then go into the article asset and type the name of the database at top of story (Or, Click here to search XXX database)

Mark the name, click on the Insert/Edit Link symbol (small chain link symbol)

Past in the URL and click insert.

This makes the name of the database a clickable link.