Using overriding project parameters and data sources with TestProject UI

[james.storey]

Using the API requests, It’s possible to provide both a data source and overriding project parameter values to those default values that already exist.
An example would be:

{ 
    "projectParameters": {
        "ApplicationURL": "https://overridingapplicationurl.com"
      },
    "testParameters": [
        {
            "dataSourceId": "<DATA_SOURCE_ID_GOES_HERE>"
        }
    ]
}

However, it appears the same cannot be done from within the TestProject UI.

It’s not possible to provide both overriding project parameters and a data source, whether running the test scenario directly or encapsulating it within a testproject job and running that.

Is there no way to achieve this in the TestProject UI?