I didn't have any luck when searching for it either, but its real easy. I did this on my forum the day after I installed it.
Just put this in the parsed header:
(change the "yoursite.com" to your domain)
Code:
if ($bbuserinfo[usergroupid]==6) {
$ACP = "<a href=\"http://www.yoursite.com/forums/admin/index.php\">Administration Panel</a><br>";
} else {
$ACP = "";
}
And then put $ACP in the footer where you want the link to be.