Do you know how to use a multi-meter? I've never looked at the details of the valet switch, but I would assume you're either sending it power, sending it ground, or just creating continuity across the two pins to enable the switch. Once you know that, use a multimeter to determine continuity on the switch you're trying to use, and you should easily be able to find two pins that will work well, so that when you push the button, the pins connect, and push again and they disconnect.