How to add text to the topic sidebar?

Hey!

How can i display a normal text in the sidebar from topics. Maybe you can just refer to an existing plugin which use the space below the group links (Group activity, Group discussion,...).

Thanks!

 

  • A plugin which hooks in the sidebar from topics would be fine! I just want to see how they managed it :). I searched for 1 hour now, but without pictures it is kind of annoying.. :-/