link to page from gallery thumbnail

This is the gallery page. Each thumbnail has a custom field and I would like them to each link to a seperate page/url.
https://www.thomassandberg.dk/produktioner/

You can try with this guide
https://wpbyme.com/wordpress-advanced/wordpress-link-nextgen-gallery-image-page-post/

I’m trying to do the same. I tried to follow the guide from the link carlosguadian posted, but in the files they’re referring to I don’t find the lines which I’m supposed to change.. .

You should take a look at this:

https://www.ads-software.com/support/topic/custom-field-http-links-not-working?replies=19

It worked for me! Links are working perfectly now.