Add link to connexion message

Hi all,

I'm using Joomla 3.2.3 and K2 2.6.8. with Komento.

Only registred users can post comments. I chose to display "you need to connect to post comments" message to public. I don't want to dispaly the login form directly because I'm using BT Login.

I want to put a link on the connexion message which is going to open BT login form.

I know how to do this with K2 comments form :

<?php $user = JFactory::getUser(); if ($this->item->params->get('comments') == '2' && $user->guest): ?>

         <div><a href="#" class="k2-login-open"> <?php echo JText::_('K2_LOGIN_TO_POST_COMMENTS'); ?></a></div>

   <?php endif; ?>

Then I use .k2-login-open as log in tag in BT LOGIN. It works very well.

I would like to do same thing with Komento message "you need to connect to post comments" but I don't know where I can edit it.

Thanks for help.