Boot the chromebook from the motherboard.

Hi.

I am thinking of creating a "apple tv" ( basicually a streamingbox) since i have a leftover. I want to make a nice case for it, but cannot do so because of that the on/off switch on the keyboard prevents me to remove the keyboard. So, i want to add an custom button to the motherboard, but where do i find the two pins on the motherboard to start the chromebook.