Troy, not knowing any details it looks to be a momentary switch, meaning it will "complete"
the circuit as long as it's held. There is probably another wire connection out of sight.
You have to find out if it can handle amperage. If used I'd suggest a relay. You'll still
need a key to supply the initial voltage control, pwr to ignition and security.
It shouldn't and doesn't need the dash ground and I'd bet it's not grounded.
It looks nice.