Set World Center Mode to ImageTarget

How can I set the WorldCenterMode to the first detected ImageTarget? 

Where do I see even those options in Unity? When I create a new ImageTarget, I don't have any option to set for that. 

Here is a screenshot which I found (not mine), it should be something like that:

Source: https://stackoverflow.com/questions/47843812/the-value-of-world-center-mode-in-ar-camera-doesnt-change

I don't also have the VuforiaBehaviour Script. And also couldn't find this options in >Window>Vuforia Configuration

At the moment Hololens Camera is the (0,0,0) origin of the scene. I want that it is the ImageTarget. 

Edit:

OK I see, for that option you need to add a > Vuforia engine > AR Camera; But I am using the MixedRealityToolkit Camera for Hololens.

And I also see that the option on HoloLens is anyway not supported.

Maybe I just need to get the position of the ImageTarget and use that as an anchor.