If you have access to a different CNC machine, you'll need to generate your own GCODE for milling the touch pads. You can download the Fusion 360 source file and program your own tool paths via the CAM workspace.
If you do have access to an Othermill, you can use my GCODE file in Otherplan and cut them out as is. As long as you have aluminum stock that's about 3.1mm thick, you should be able to cut them out without any issues.
I'm going to assume you know how to use the Othermill and Otherplan. So I won't cover that in this tutorial. I will however show you how to setup multiple jobs in Otherplan so you can cut all six pads on a 4" x 4" piece of aluminum.