moodle/auth/cas/cas_form.html

<div class="loginbox clearfix">
<div class="loginpanel">
<div>
<a href="<?php echo get_login_url() . '?authCAS=CAS';?>"><?php print_string('accesCAS', 'auth_cas');?></a>
</div>
<br/>
<div>
<a href="<?php echo get_login_url() . '?authCAS=NOCAS';?>"><?php print_string('accesNOCAS', 'auth_cas');?></a>
</div>
</div>
</div>