RAMPS 1.2 and 1.3 use the same pins for the X and Z endstops, but the Y endstop moves down two across the versions.
Possible workaround - use configuration 33, edit pins.h to pus the Y endstop on the x-max pin, and plug Y into x-max. But double-check the Y endstop wiring first.
Possible workaround - use configuration 33, edit pins.h to pus the Y endstop on the x-max pin, and plug Y into x-max. But double-check the Y endstop wiring first.