Here is your answer: https://www.ads-software.com/extend/plugins/open-external-links-in-a-new-window/.
Then type: wp_carousel_link_url
as your custom post along with a regular URL in your custom fields on your posts.
When you add your images as “featured image” DON’T place a URL. Then tuda! New link in different window. If you want the link to display like normal, don’t use the first plugin listed above.
It’s 11 months later, but I hope it helps someone.