Hi I'm working on building a MAME cabinet and my problem is that I'd like everything to turn on all at once. I've got my computer and the monitor figured out but I'd like to get my speakers on the same switch. My speakers are from an old car audio system with a 350W computer power supply powering the amp. I turn on the speakers by shorting the green and black motherboard wires but I'm looking for a way to have it tie into the other switch (push button, speakers are on an on off toggle switch). Is there something that I can get to put in between the power supply and the switch to accomplish this?