{"contextEntityId":77058481}
In this case there are three child pages. To add diagram templates to these section, add the diagrams to the child pages as you would add diagrams to a normal Confluence page:
The titles of the sections match those of the child page titles and the diagram titles in the splash will use the names of the diagrams in the pages.
When a template is used, a copy of that template is saved locally to the page, the original template is unchanged