Help: x360 pcb + mayflash arcade stick

[corndoge]

Hey,

I'm trying to get this controllers: http://www.slagcoin.com/joystick/pcb_diagrams/360_diagram5.jpg
L3, R3, SELECT and HOME to use this pcb:
that was in a Mayflash Arcade stick.

As you can (hopefully) see on the picture of the MF-PCB that they all are connected to the same ground (top), but as you also can see on the 360 diagram, most of the buttons have their own common and as the noob that I am in this whole thing, when I connect them to the mf-pcb they all get pressed at once whenever I push a button.

Is there any way to have it work without doing cuts? As I planned on using the xbox360 pcb wirelessly and if needed i can plug the usb cable in to use the mf-pcbs in it.

Thanks