Referencing a Hyperlink in "Relative Path" form

On one of the slides, i would like to keep a "Further Help" hyper-link. Clicking the hyper-link will take the users to a HTML file.

If the HTML file is already hosted elsewhere, it is easy to refer to that through "Absolute Path" in power point "Hyperlink".

However, that HTML is not hosted anywhere yet. And I want to author and supply it along with the Course I am publishing.

So, the question is... How do I refer to the "Relative path?" so that it works during the Review/Development stage as well as Final/Deployment/After Publishing the course?

Thanks for your help