Locate the harness plugged directly into the back of the door lock switch.
Power door lock wiring.
One wiring scheme is resistive rest at ground which has been used in the past by various.
Basically each wire on the actuator rests on ground and then when the one relay gets activated the ground gets lifted to the actuator and power gets applied to the actuator making it go one way.
If there are no external door lock.
Power door locks have been around for many year but manufacturers use different wiring schemes.
Call 800 505 3274 or shop online.
This video will show you how to wire relays to control aftermarket door lock actuators.