When you have structured data code with you, only add it to HTML code of your page. For CMSes it depends upon the file where the HTML of your theme is coming from. It could either be header.php or every other file while in the theme folder. Listed here I’m https://www.presta-addons-modules.com/en/opencart-seo-automatic-google-rich-snippets-json-ld-integration-opengraph-twitter-tags-schemaorg.html