autoship_after_print_product_custom_order_settings_fields (action)
(src/product-page.php) Can be used to add custom content to the end of the 'autoship-sync-active-option-group' div after the options and checkboxes. It takes the $_product as a parameter
Code
<?php do_action( 'autoship_after_print_product_custom_order_settings_fields', $_product ); ?>