how to create a point of origin?

[kiteman]

I am photographing the surface of a series of concrete blocks in 3D, one by one.
How do I create a common origin for all models, with Agisoft?

I constructed a frame where emplace concrete brick, and then all the blocks are in the same position.

I would like to orient the surfaces of all the blocks in the same way between them, and give a zero point to the cloud of points (for example, the angle at the top left).

Is it possible? and if so, how?
thank you very much Stefano