Adding custom header to auth profile token call

Hello all,

I currently have a test case with many test steps associated. I am trying to setup a new auth profile to test out a new authorization method, but the new authorization requires a custom header. I have tried using an automation script (the button in the auth manager) and it does not seem to be working. How would I go about attaching custom headers to the authorization/token call if it is setup as an auth profile?