Do you know how the power button works? Is it momentary (you push it and it is only making contact for a short while) or not (you push the button and it makes contact until you push it again)??
You could cut an old micro usb cable and connect the ground wires together and then route the power wires through the power switch on the console.
If you’re not familiar with the inside of a usb cable check out:
http://markjohann.hubpages.com/hub/Color-Coded-Wire-inside-the-USB
If you have any more questions try to find me on Google Plus http://www.gplus.to/dustinevans or http://www.dustinevans.net
Good luck with your project.