Hbot inverted X axis (2 replies)

I build an Hbot before with printing area 20*20*20cm and now i'm building a bigger printer with printing area 40*40*40cm , I used the same wiring and program for the smaller printer but my X axis is inverted when homing the X axis.

I don't know why?

I tried to reverse the motor wire but it changes all the movement.

How can i invert only X axis when homing?

My homing is back right , now my homing is back left