Need help with Google website link - Joomla! Forum - community, help and support

hi,

i need linking website google+ page.
google's instructions:

----------------------------------------------------------
link website
by adding short line of code http://www.example.com/, can make google+ page eligible show on right-hand side of google search page relevant queries , make google+ page more discoverable.
ask site's webmaster add following line of code site's homepage:
<a href="https://plus.google.com/+example" rel="publisher">google+</a>
you can email these instructions webmaster
----------------------------------------------------------

i'm using template called "derfotograph 1 page" (http://www.sinci.at/free-templates/12-j ... plate.html)

i dont know insert "<a href="https://plus.google.com/+example" rel="publisher">google+</a>"

i have no coding experience or web development experience
i tried pasting code index.php when test google's tester following error "check line of code has been added site's homepage , modified homepage live on site. try testing again."

any appreciated

1. it's more sensible, joomla, put in custom html module, rather template itself.
2. need edit part in quotes after href, reflect actual g+ address; they've given placeholder.