Need to add tracking pixel to account activate page

I have a site under development at http://www.mygotgame.com. I am using iDev Affiliate to track user registrations.

I need to add a tracking pixel to the "Activate Your Account" page (see attached screenshot) on the front-end of the site.

I have the tracking code ready to go; I am just trying to find where the layout code is for that EasySocial page. If you could point me in the right direction that would be greatly appreciated.

Thanks!