Postgres integration Fleet

I'm trying to install the Postgres integration to get metrics via Fleet,
but when I get to the configuration I don't have the option to add the database from the UI, no matter how I add the database in the connection string I always get errors.
does anyone know how to configure it?

in this second image in the server the user appear as the database but i´ve never add that config.

I don't see a config for database name either, can you try setting the database in the host url?