Where/How to add links?

[SPEEDKILLZ]

On my skin i have buttons at the bottom but cannot figure out how to link them to my accounts? This is the code in my custom footer template

<a href="#"><img src="images/tf_ideal/social/facebook.png" alt="Facebook" /></a>
<a href="#"><img src="images/tf_ideal/social/twitter.png" alt="Twitter" /></a>
<a href="#"><img src="images/tf_ideal/social/youtube.png" alt="YouTube" /></a>

Where would i add the links?