You should move Y Endstop, to the same side of X Endstop, and turn arround the Y axis motor conector in your motherboard. That should fix the problem
Your welcome!!
It’s possible that the machine, by default, homes Y to its maximum instead of minimum. You would still have to invert the direction of the motor either electrically or in software, but you could leave the switch where it is.
If he do that @Whosa_whatsis need to change in the slicer software also?? or its not needed?? I mean in repetier host, in the machine settings, you got to change Homing direction?? X to min and Y to Max, or its not really needed 
@MakerGal @Whosa_whatsis now I’m just getting confused.
You got 2 choiches, or either you change the endstops to the other side, or just change in Marlin the homing direction, you can say that your Y axis home to Max instead or Min
@MakerGal @Whosa_whatsis so I took a look in slic3r and they have a flip option so you can flip your part on the x y and z axis. Not to confuse with routine.
That’s also another option, if it works fine, do that, easier and faster
@MakerGal @Whosa_whatsis again thanks for the help.
Stepper and endstop wired and mounted wrong. Normally you can fix this in firmware, quicker to bodge it methinks
Btw, I have to say that you have an impressive array of 3D-printing-related software in your dock. Do you still get much use out of pleasant3d?
@Whosa_whatsis I don’t use it really anymore. I just used it to check my gcode. It’s pretty cool still.