I wonder what is the standard procedure to calibrate a focus on yashica 35GSN?

I read that there is vertical and horizontal calibration.. are both screws under the top plate?

and i read that 2 distance need to be calibrate as infinity and 1m..but issit it is accurate as long as infinity is calibrated? since i don't think there are 2 mechanical settings.

and do i need to calibrate by putting a glass plate on film plane to visually check the focus is correct before i adjust the rangefinder?

what is the steps? thank you.