Need help with the setup

Could somebody please help me with Step 3 of the installation?

I don’t understand what I need to add /changein the single.php file.

That would be highly appreciated.

my single.php file looks like this:

<?php
/**
* The template for displaying all single posts.
*
* @package Seekers
*/

get_header(); ?>

<div id=”wrapper” class=”<?php seekers_single_page_class(); ?>”>

<?php seekers_action( ‘single_top’ ); ?>

<div class=”container clearfix”>

<?php
seekers_single_featured_image_effect();

seekers_action( ‘before_content’ );

seekers_single_sections();

seekers_action( ‘after_content’ );

get_sidebar();
?>

</div>

<?php
if ( ‘full’ === seekers_get_settings( ‘related_posts_position’ ) ) {
seekers_related_posts();
}
?>

<?php
get_footer();

The page I need help with: [log in to see the link]