Add New fields inside Edit User option in Users and Roles

I am using OJS3.3.0.15,
I would like to include additional fields in the ‘Edit User’ button within the ‘User and Roles’ option. These fields correspond to the ones I created on the User Registration page. I have identified the ‘userDetails.tpl’ file, but the tags used within it are unfamiliar to me. Can you provide guidance on how to integrate the new fields into this template?
Thanks you