I simply used a template I found here, edited it slightly, printed it off twice (for two players), cut it out, measured, and placed it on cardboard. Once I was happy with the mockup, I measured the distance from the sides and bottom to the template, then marked them on the wood. I placed the template on the wood and marked the drill points.
For my start/admin buttons, made sure to just measure them all the same distance from the top and between each other. (I did an inch and half both ways)