Webform Protected Downloads Module
I have never used that module before but by reading its home page I found this

When a user submits a webform with protected files he will be sent an
email with a link to the downloads page. The link contains an
individual hash code that will be checked upon page load to verify the
access. If verification fails access will be denied. If it succeeds
the user will see the default private upload file listing with all
protected files that are attached to the webform.

Now based on your question you want to add a link direct to the protected files by the module, bypassing (if that is possible) the access verification, to violate the module's functionality. Why you want to do that ? I think that this is not a good idea even if possible. Probably you are looking for another module or I am missing something.