How to manage external project stakeholders in PSA?

I've been a PSA user for a few years now and have made many internal requests for updates to better support my PM organization to manage projects.  I have run into wall regarding tracking external project stakeholders and am looking how to track those contacts and roles within PSA.  I have found a Contact Roles quick link section under opportunities but nothing similar to this under PSA engagement or sub-projects .  Any suggestions on how to achieve this and what I need to ask of the admin team would greatly be appreciated.  thanks