Add Test Studio Test Cases to an existing pipeline (pipeline has Azure Repos GIT source)

[leeleeleeleeleeleelee]

I am attempting to add test cases created in PowerApp Test Studio to a Azure DevOps Pipeline. Instructions here show how to add test cases to a new pipeline:
https://learn.microsoft.com/en-us/power-apps/maker/canvas-apps/test-studio-yaml-pipeline

The project I am working on already has a pipeline set up, that references a Azure Repos GIT source.

What would be the best way to set up test cases into an existing repo such as above? Perhaps the code in this repo would be added in the existing Azure Repo?