Role Assignment to Workflow Tasks

Hi Experts,

Any hints on below requirement please :

Details:

1. For a role in transaction PFCG, I don't see the Workflow tab

2. For the same role in transaction SUIM, I can see the Workflow tab and the tasks assigned.

3. Now, I have a list of workflow tasks and I need to assign Role X, Role Y to all of them

What is the correct and best way out to do this

- Role-Task Assignment ::: Is it enough if I add all the workflow tasks in SUIM transaction(workflow tab) for both roles X,Y

or

- Task-Role Assignment ::: Can I assign both Roles X,Y in pftc transaction for each of the workflow tasks

or

- Both need to be done

Thanks in advance ...

~Ali~