Breadcrumb NavXT Settings

How to use Breadcrumb NavXT with Mystique theme I have install the plugin but I don’t know where to add code

<div class=”breadcrumbs”>
<?php
if(function_exists(‘bcn_display’))
{
bcn_display();
}
?>
</div>

Please tell me appropriate file of Mystique theme and where to add code. My website url is http://www.namase.com