What specifically are you trying to accomplish? If you're just wanting to add some files to a project, best means is to edit the project description and drag the files into that box.

Yes, i want a way to show files that are linked to the project.
What you suggest works as well. I guess I can edit the project descriptions and add {FileID} in descriptions.

But what i did earlier was to use the upload file function, and it had the option to set visibility. I typically set it to link to the project name.
Just thought there would be a file tab in the workboard area ,where it can query files that are set depending that workboard project.