How do I configure an Omnistudio Data Mapper or Integration Procedure to pull record data from Data Cloud?

Context: 

• Uploaded a csv file as a data stream in data cloud
• Data Lake Object successfully mapped to Data Model Object

Goal: 

• Display the record data from Data Cloud in a Flexcard on another object in our SF org. 

Problem: 

• Can't figure out how to access the record data in the DLO or DMO with Data Mapper or Integration Procedure. 
• The best I could figure out what how to return the DLO itself via the DataLakeObjectInstance object.
• Can't find any good documentation or examples to walk through this use case.