How to display links to supplemental files in article view

Trying to figure out where / how to add / enable links to supplemental pdfs in the article view in the Default Theme. Any help is much appreciated.

OJS, Default Theme

Additional information
Example of an article with supplementary files:

Hi @soj,

Do you have it published as a supplementary file as a galley in the example that you linked to? It doesn’t appear so… but is it just not showing up for you?

PKP Team