Hi Korrotherm,
Actually we don’t have the exact idea. For the header content it is displayed from the theme folder(attitude-pro) -> library -> structure -> header-extension.php
You may add your code in this file but We recommended not to change the code because if you change the code then while updating to our new version all your customisation code will be lost. So better make child theme and first unhook the functions and the edit the code.
http://codex.wordpress.org/Child_Themes
Thank you!
.
.