Its too late but it can still help to others who are looking for the same :
Copy “plugins\woocommerce\templates\cart\cart-totals.php” to
“your-theme\woocommerce\templates\cart\cart-totals.php”
Open “your-theme\woocommerce\templates\cart\cart-totals.php” and add the following line inside the table tag
<?php do_action( 'woocommerce_cart_totals_custom_text' ); ?>
Then open your function.php and add the following:
add_action( 'woocommerce_cart_totals_custom_text', 'action_woocommerce_cart_totals_before_shipping', 10, 0 );
function action_woocommerce_cart_totals_before_shipping( ) {
echo "<tr class="cart-subtotal"><th>Title</th><td>Text</td></tr>";
}
Here is the result