Normally if the car was equipped with a factory keyless, There will be a trunk release actuator. Obviously you did your homework on your car. 9 out of 10 cars with keyless entry have an electric trunk release actuator and most commonly triggered by a ground circuit. Also and most importantly relays are normally required b/c the output on most alarms is between 250-500ma. I was an installer for 10 years and its nice to see that people are still taking pride in installing electronics in their vehicles instead of half assing it.