Create custom content in admin dashboard

Hey,

I want to create a custom container with some content in the admin panel of my users, but the only way of doing this (as I see it), is to only create the dashboard with only one row, and then create a custom dashboard box with my content.

BUT, i do not want to only have one row for the other dashboard content, only for the custom html/php i want to create.

You can see the image if you want to get a better look of what i am trying to do.