file woocommerce-cart-add-ons.php

cercare la linea <ul class=”products sfn-cart-addons”>

<ul class="products sfn-cart-addons row large-columns-4 medium-columns-3 small-columns-1 row-small">

 

AGGIUNGI AL FILE woocommerce-cart-add-ons.php (riga 71 circa)

//checkout page
add_action('woocommerce_after_checkout_form', array($this, 'cart_display_addons'), 20);