Just buy a central doorlock kit.

With a central doorlock kit, the doors will lock when you open it from either front door with the key or from the lever inside the car.

It can also be controlled by an alarm. Its MUCH easier than 2 actuators and gives you all the wires.

If you cant find it locally, here.

http://store.autotoys.com/cgi-bin/wf...lockCentralKit