the URL of characteristics product checkout page?

I am using my own add to cart buttons in a photo gallery and I am wondering what URL do I need to use to access the pre-checkout charasteristics page of a product (the page where you choose the size and the purpose of a photo and the price changes accordingly before proceeding to the checkout).

The generated url (http://mydomain/index.php?option=com_hikashop&ctrl=product&task=updatecart&quantity=1&checkout=1&product_id=1) doesn't work, since this is not a single-price product but a multiple-price product. How would the correct URL (based on product ID) look like?

Hi there,

If you want to hardcode these url, I think the best way is to look at the url of the add to card buttons in a classic listing.
You can also take a look at the listing_img_title views (in Displat>Views) and find the part of the view which generate the url.
With this you should be able to generate a dynamic url

Once I disabled the SEF I was able to see the proper url. And I'm posting it here if somebody else needs it: /index.php?option=com_hikashop&ctrl=product&task=show&product_id=x