Enter the Bitbucket Server repository you want Jenkins to build from. To find a repository, start typing. If it doesn't appear in the search results, the credentials that you've chosen may not have read access to it and you'll need to provide different credentials.
To get Jenkins to build from a personal repository, enter its slug. This is the URL-friendly version of the repository name. For example, a repository called my example repo will have the slug my-example-repo, and you can see this in its URL, https://bitbucketserver.mycompany.com/myproject/my-example-repo.