[Extending][Adding a Section to a Settings Tab] How to Create a Section
/**
* Create the section beneath the products tab
**/
add_filter( 'woocommerce_get_sections_products', 'wcslider_add_section' );
function wcslider_add_section( $sections ) {
$sections['wcslider'] = __( 'WC Slider', 'text-domain' );
return $sections;
}