Include GDSTAR in Arrastheme !!HELP!!

Cheers folks,

on my website https://www.maastown.nl i want to implement the gdstarrating for each post in my theme. To me more precise: I want to put it in the “Node-based” view of the post (under 01 LOCATIONS and 02 UPDATES) so that everyone can see in the thumbnail right away the rating of each post.

As written on https://info.dev4press.com/gd-star-rating/functions.html the function seems to be
wp_gdsr_rating_article ( $ post_id = 0 )

something like that
and the place where i have to include the php-function is a php function itself in arrastheme’s filters.php

$postheader .= '</a>';

	$postheader .= '<span class="entry-meta"><a href="' . get_permalink() . '"><span class="entry-comments">' . get_comments_number() . '</span></a>';
	$postheader .= ' 	 <!-- <abbr class="published" title="' . get_the_time('c') . '">' . get_the_time( get_option('date_format') ) . '</abbr> --> </span></div>';

	$postheader .= '<h3 class="entry-title"><a href="' . get_permalink() . '" rel="bookmark">' . get_the_title() . '</a></h3>';

	echo apply_filters('arras_newsheader', $postheader);
}

Where i put the <!– blabla –> the code must be replaced since there once have been the posting dates once.

Please tell me how to change the code correctly! I really don’t know much about php and this would really push my website forward!