ACA toggle switch

Hi everyone, I write from Italy and I apologize if my English is not good, I am building an ACA version 1.8 and I do not find any information if the rear switch to choose the mono or stereo or xlr mode etc .... is it to be mounted in a specific direction or I can choose to do it as I want. I mean I have to respect a assembly direction with a specific pin up or down? Thank you very much.