Map default marker icon w/o sub-category

I am trying to have all my maps (home, listing and details page maps) to show my 1 default company icon.
Why i just wont repeat the icon on category icon is that i need every category to have separate icon to display on details page later.

I used both codes from this topic: https://wpgeodirectory.com/support/topic/map-icon/

It worked perfectly with sub-categorys, but could it be tweaked to show defult icon (set at design>map>Upload map default marker icon) on all the maps all the time.

The codes i used:
(it pulls from higher cat id, but i dont want sub categorys, it just makes useless string for front and back end usage)

add_filter('geodir_before_marker_post_process','_my_use_higher_cat_id');

function _my_use_higher_cat_id($posts){

	if(!empty($posts)){
		foreach($posts as $key=>$post){
			$pt = esc_attr($_REQUEST['gd_posttype']);
			if(isset($post->{$pt.'category'})){
				$cats = array_filter(explode(',',$post->{$pt.'category'}));
				$post->default_category = max($cats);
				$posts[$key] = $post;
			}

		}
	}
	return $posts;
}
add_filter('geodir_map_canvas_jason_detail_page_map_canvas','_my_edit_detail_marker',10,1);

function _my_edit_detail_marker($map_canvas_jason_args){

	echo '###';
	print_r($map_canvas_jason_args);

	return $map_canvas_jason_args;
}