This is a test page for gathering Box Links for inclusion on other pages, or for testing asset re-linking approaches.
This is an hidden/internal page (not available from search, etc).
Getting a relative Link for Box Assets
Once adding a Box link / document, save and view the PUBLISHED page to get a RELATIVE URL for the Box assets below for use in other pages.
Once added to this page the URL can be embedded in any source snippet within another Drupal page without embedding a "Drupal Entity" which has issues for formatting, clickable links etc...
For the final site migration, some BOX assets need to be "re-linked" in order to be accessible in Drupal. The only way to do this is add it to the page and save / publish. Potentially they can be added in bulk in this page or another hidden page, and then use asset URL rewrites for any folder path differences, so the links don't break in Drupal. Or even better, an automated strategy.
(once used/referenced elsewhere in the site, they can be deleted)