Setting default project folder as a relative path

Further to my initial question, with reference to the link:

https://support.smartbear.com/testcomplete/docs/working-with/integration/bamboo/requirements.html

"You can store your test projects to a source control. Configure your build plan to get the needed files from the repository to the needed folder on the agent.

– or –

You can store your test projects to a shared network folder."

If the test projects are stored to a source control, when test execute comes to execute the project how does it know which folder to look for?

Or if I opt for the alternative: "Configure your build plan to get the needed files from the repository to the needed folder on the agent" how is this done?

Cheers