Best practice/approach to assign resource role and contract organisation to employee

Summary: Best practice/approach to assign resource role and contract organisation to employee

Content (required): We see various systematic ways via which employee can be associated with resource role and contract organisation. We are using buy intent procurement contracts

1. Manage Users screen - By populating resource roles and organisation fields under resource information section
2. Setup and Maintenance- Manage Resources (Here you add employee as a resource and you can assign the resource role and organisation)
3. Navigator> Others> Resource directory- same screens/steps as 2 above

The simplest way seems to be option number 1, however, we are unsure if there are any impacts in terms of various options. Can anyone please suggest?