Change active tab "Justified Tabs"

I am having difficulty figuring out how to change the active tab from the the default of farthest left position, to the center tab position.

In my screen cap you will see it auto sets the "Domains" tab to active, I would like to change this to the "Anycast DNS" tab. I have added a class of "ui-state-default ui-corner-top ui-tabs-active ui-state-active" to the li but "Domains" tab still loads in open position and Anycast DNS" remains always open, any idea on how to correct this?

Found answer in documentation.