HSDL- How to give access to Elevated User BO to custom role

Summary:

We would like to give to a custom Super User the ability to run spreadsheet templates available only to Elevated Users

Content (please ensure you mask any confidential information):

Our customer uses only custom roles, and he needs a Super User which is able to use Templates with the Elevated User set on "Upload Data As".

Some BOs need this kind of User and it's not possible to change the Upload Data As when we create the template, so how can we give the access to this BOs to a custom Super User?

Thanks

Best regards, Giuseppe