Have you looked at the documentation on assigning TestNG tests in QA Complete?
https://support.smartbear.com/qacomplete/docs/user/test-management/library/automated/automations/testng.html
We have it running as follows on the automation tab of the Test Case:
Set your title and timeout per your discretion.
Agent = TestNG (Selenium)
Test Class = script.{YOUR_TEST_SCRIPT_NAME}
Check "Use Maven Project"
Url, UNC, or local path = file:///C:/Documents/Workspace_Selenium/{YOUR_PROJECT}
* This one will depend on where your automation is running. Our runs on a VM and this is the path on the VM.
