Moving Meta Box created with Custom Post Type UI

I am trying to change the default position of a taxonomy meta box created with the Custom Post Type UI plugin

http://wordpress.org/extend/plugins/custom-post-type-ui/

I am unable to determine the proper callback.

This is what I have:

add_action('do_meta_boxes', 'xyz_move_meta_box');

function xyz_move_meta_box(){
    remove_meta_box( 'xyz_taxonomydiv', 'post', 'side' );
    add_meta_box('xyz_taxonomydiv', __('Primary'), 'CALLBACKGOESHERE', 'post', 'normal', 'high');
}

The box is removed, however I can’t get it to add back with the proper contents until I can figure out the callback.