Daniel,
It looks like JomSocial's HelloMe module doesn't have the same JFBConnect integration that they added to other parts of their extension.
If you want to add it, you should be able to edit the /modules/mod_hellome/tmpl/default.php file. Around line 290, you'll see:
</form>
<?php
}
if ($params->get('enable_facebookconnect', '1'))
After that closing form tag, add {JFBCLogin}, like:
</form>
{JFBCLogin}
<?php
....
That should add the buttons like you're looking for, but please test and let me know how it goes. Also, you may want to contact the JomSocial support and let them know you'd like them to add JFBConnect integration to HelloMe
Thanks,
Alex