By default plugin labels must work fine with almost all WordPress themes.
To display label plugin use some standard WooCommerce hooks that use nearly all themes.
For archive pages:
On image position - woocommerce_before_shop_loop_item_title | 10
Before title position - woocommerce_shop_loop_item_title | 9
For single product page:
On image position - woocommerce_product_thumbnails | 10
Before title position - woocommerce_single_product_summary | 4
In most cases you don't need to change this hooks in order to display labels. But sometimes in rare cases you will have such a need. And the plugin has a special option for this inside its settings page.
Hooks settings
With Hooks settings it is possible to simply change hooks that are used for each labels positions. You can choose a predefined hook from the list or set any custom ones.
Also, if you are familiar with coding skills, it is possible to use a special plugin filter called awl_labels_hooks. With this filter it is possible to change any hooks right from php code.
Example:
add_filter( 'awl_labels_hooks', 'awl_labels_hooks' );
function awl_labels_hooks( $hooks ) {
$hooks['on_image']['archive'] = array( 'woocommerce_before_shop_loop_item' => array( 'priority' => 10 ) );
return $hooks;
}