To download the documentation sent by the candidate, simply access the profile of the desired candidate within the Admissions page, in the part about Onboarding.

Access the Admission page from the side menu

When you click on the attached document, it will open a new page where you can view a task list containing all the requested documents. Within this list, select the desired document 

On the screen, all files submitted by the candidate will be displayed; simply select and click on 'Download File.' It's also possible to download all documents at once by clicking on the 'Download All Files' button

The image below shows an example of a document submitted by the candidate.