How to add sandbox element and id element of iframe tag elements

I have inserted HTML files(included javascript) into several slides by using  WebObject tool of Storyline, but I need to add sandbox element and id element of iframe elements into any file of Storyline published files.

<iframe src="index.html" style="width:100%;height:100%" Sandbox="allow-same-orgin now-scripts" id="iframeRecorder">iframeRecorder</iframe>

Could anybody who know how to add the iframe elements let me know?

I checked only some files that seem to be related to iframe in the storyline output files.

story_content/story.js
html5/lib/scripts/app.min.js
html5/data/js/5viqBVSO5lz.js
html5/data/js/6Khv5QB6YHE.js
...

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