LR3 Dual Endstop - Change Y Homing Direction

I’m definitely not the expert on this, as the only things I know about it are that I was able to reverse the X axis homing direction in my successful efforts to flip X and Y with each other. The reversal part is described here:

LowRider 3 CNC - reversal of homing on short axis (for swapping X & Y axes) FOR PRINTED XZ PLATES (v1.3b)