buy it now (on addtocart and list)

[f1-outsourcing]

this is a nice solution for adding a button to buy a product quickly, going directly to checkout (although it does not clear your cart first)

https://magento.stackexchange.com/questions/123072/magento-1-9-how-to-add-buy-now-button-in-product-page

However this is a solution for the product page. I would like to have this button also on the list.phtml.

on the addtocart.phtml we have this
onclick="productBuyNowForm.submit(this)"

on the list.phtml we have this
$this->getAddToCartUrlCustom($_product, [], false);
onclick="customFormSubmit('<?php echo $_cartUrl ?>', '<?php echo $_params ?>', 'post')"

this carUrl is something like this:
..../checkout/cart/add/uenc/aHR0cDovLzE5Mi4xNjguMTEuMTkvc2hvcC9lbl9nYi9rZW1wby5odG1s/product/13/

I was wondering what the method/url is for adding the product to the cart and going to checkout from the list overview. If that is even possible on this page.