Ultimate Branding - Custom Admin Bar - Link to Logout


I am trying to add a logout link using the Custom Admin Bar module from Ultimate Branding.

What is the link target that I should use ?

Wordpress documentation suggests that it is better to use the following:

<?php echo wp_logout_url( $redirect ); ?>

But how can I use this directly in the Custom Admin Bar setup ?

Thanks in advance for any help or pointers.