Questions on Calculated Cross Reference field

We have an application "Audit Engagement" that is cross referenced to "Crunchy Questionnaire" and "key Controls" applications. Within the "Key Controls" application, we have level application "Test Steps" that is not cross referenced to Audit Engagement nor Crunchy Questionnaire. The requirement is I need to pull Crunchy questionnaires IDs related to the specific audit to the "Test Steps" layout. How do I accomplish this? I can do this on the Key Controls application using calc cross reference but not able to do on the Test Steps level of the Key Controls application.

Any ideas will be helpful.