Stepper - INDI-DUINO, suport INWARD/OUTWARD buttons - by: kalda

Hello everyone,
i want to build a focuser ( indiduino.wordpress.com/2012/11/13/stepper/ )

I like the simplicity of the tutorial.

INDIDUINOStepper.ino supports INWARD / OUTWARD buttons.
But I did not find their schematic connection. In the code I found the following lines:



So I have to plug the buttons on PIN 2 and 9?

Thank you.