I've figured out the code. This is what I have in my template and it works!
<?php $childargs = array( 'post_type' => 'products', 'numberposts' => -1, 'orderby' => 'post_id', 'order' => 'ASC', 'meta_query' => array(array('key' => '_wpcf_belongs_manufacturer_id', 'value' => get_the_ID())) ); $my_query = new WP_Query($childargs); while ($my_query->have_posts()) : $my_query->the_post(); <h2><a href="<?php the_permalink() ?>" rel="bookmark" title="Permanent Link to <?php the_title_attribute(); ?>"><?php the_title(); ?></a></h2> <?php endwhile; ?>