Where is the "Google Analytics UA Number" field in the AB Theme Testing?

In the settings page for A/B Theme Testing, there is no field to enter Google Analytics UA Number, as per the screenshot. If I just place the tracking code in header.php, is that enough?

Additionally, the site is in development, and the url will change to a different domain once we launch. Are there any licensing limitations that I should be aware of, or will the plugin work on the new domain as well?