Post Title as link

I am using a formidable form and ceating a post on ‘Submit’. This puts the data into our library where the article title was a link to the actual pdf document stored by using Formidables field ID’s using a phrase like this <div><a href="https://dev.ccrasa.com/doc_archive/[960]" target="_blank">[857]</a></div>
We decided that we should output the form data as WordPress posts and take advantage of indexed ajax search utilities, wordpress taxonomy and other benefits.
I have looked at the plugin “Page Links To” but there would be a lot of manual work involved. The link below shows another way to do that.
https://www.wpbeginner.com/wp-tutorials/how-to-link-to-external-links-from-the-post-title-in-wordpress/
The problem is that if I use formidable field ID’s how will WP know which form entry I was meaning. Would I have to create a custom field in the WP post to receive a user ID so that the post can find the relevent fields. It’s all looking a little impossible at the moment, does anyone have a positive outlook for this?

regards