Links media items that are already associated with a specific product to a choice within the same product.
Media items can only be set for choices within one option at a time - e.g., if you set media items for some or all of the choices within the Colors option (blue, green, and red), you won't be able to also assign media items to choices within the Size option (S, M, and L).
To remove all existing media items, call the Remove Product Media From Choices endpoint.
Product ID.
Product media items and the choices to add the media to.