Homing Configuration

Here my newest problem )
I have specail wish at the homeing.

I will not homing at X=0 / Y=0 but opposite also at x=1000 / Y=1000, look at the image.
I have installed all Homingswitch on the backside from the machine, it was easier for electrical installing, but my zeropoint is becuse of this, on top / right and not bottom / left.

I operate from headside / topside / overhead, I do not know it to say it.
I will turn it.

What sould be set in the ini file. I have tried anything but it will not run.

Please help

Infinite thanks to all.

https://www.dropbox.com/s/8dszqxvbsihnzeu/homing.png?dl=0

that is fine
look at home offset in your ini file it will be 0.0 change to 240 or what ever your current point is
also you may need to change homing directon so making the home velocity and other homing values with a negative value , in effect reverses it