Geeetech

I have a Geetech i3 (i believe it is a c).
Where is the board identified?
I want to add a bltouch to this unit and want to know the correct board version (so i know i have correct information for firmware and pins)

Thank you for any assistance.

Take a closer look at the Controller Board.
In the vicinity of the microcontroller, on PCB there are inscriptions informing about the controller's board version.

The large, legible inscription is also located on the underside of the PCB.