Our knowledge base on Confluence contains a matrix of articles and workflows that open links in new tabs when viewed via the service desk. The option to choose 'open link in new tab' and 'open link in same tab', or set up the links to operate a specific way when developing the articles in Confluence would assist our KB model. 

This closed ticket relates to this request.

https://community.atlassian.com/t5/Confluence-questions/How-to-make-links-from-a-Confluence-page-open-in-the-same-tab/qaq-p/897316