How to define startPoint and endPoint in zonesDict?

[PrikMushi]

Hi

I have a mesh from ansys fluent, which I use in my simulation. I need some additional information, for which I have to accurately setup the zonesDict dictionary file. Specifically, I need to define zones on the inlet and outlet region of my model.

How do I know what is the right startPoint (x y z) and endPoint (p q r) for the zones I want to define here?