I want to place a link to Home in the Catagories sidebox.

I don't want to change the title of the catagorie sidebox or make it a link. I want to literally place it right in with the other catagories and have it be the first one. I'm not sure which file I need to modify to do this.

I looked in modules/sideboxes/<Template Name>/catagories.php
but I'm not sure if this is the correct file for this. And if it is I'm not sure where to put the link.