Where should i put google tracking id on wybmr.n.nu?

I want to put this google tracking id from google analytics.
<script type="text/javascript"> var _gaq = _gaq || []; _gaq.push(['_setAccount', 'UA-37353751-1']); _gaq.push(['_setDomainName', 'wybmr.n.nu']); _gaq.push(['_trackPageview']); (function() { var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true; ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js'; var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s); })(); </script>
Where should i put in if i could not accessing html?

Please help me.

Taufik Setiawan
wybmr.n.nu
wybmr.weebly.com
oerip08.blogspot.com

In the settings just over the second save button you can see this:

Extra statistics tracking from a third party?
(for example Google Analytics, StatCounter) Show more [+/-]