If you manually added a link to your MB account, and you can't see it, it's possible that there are multiple links from the same domain.
First, filter for the domain your link comes from by:
- clicking the "New filter" button and then selecting "Linking page" from the dropdown menu:
Then you'll need to put in the page or domain (or part of it) you would like to filter for:
If there are multiple links from the domain, there will be a plus sign - make sure you click on it to expand and see all links: