Jack Henry jXchange REST-Legacy – How to obtain correct ClientID and ClientSecret?

Question

I am integrating with Jack Henry jXchange REST-Legacy API and followed all the steps in the self-registration tutorial provided in the official documentation:

https://jackhenry.dev/open-enterprise-api-docs/enterprise-soap-api/tutorials/registration/jx-self-reg/

My setup:

• I created an account on Jack Henry Developer Portal.
• I completed self-registration following the steps from the documentation above.
• I received credentials for JX Service Gateway, but I do not see any ClientID and ClientSecret that I need for REST-Legacy authentication.
• I tried using ClientID and ClientSecret from "Build External Applications", but they do not work.

Questions:

1. Does the self-registration process provide a ClientID and
   ClientSecret for REST-Legacy?
2. If not, how can I request the correct credentials for OAuth2 authentication?
3. Are the JX Service Gateway credentials enough, or is there an additional step to enable REST-Legacy API access?
4. Is there a way to generate or retrieve the required ClientID and ClientSecret after completing the self-registration?

Any insights from someone who has successfully integrated with Jack Henry jXchange REST-Legacy would be greatly appreciated! 🚀