If you can't find the shortcut, go Start->Run... and use "ITProSBSConsole.msc".
You can add more CALs by going to that same Administrator console, and clicking on the "To do" list in the left pane, and on the right pane "Add Client Licenses" is available.
Microsoft Licensing doesn't work on SBS server. AFAIK, this is the only way to do it.
D