Alright mate.
I have sierra sapphire central locking and barrels in my 3 door as it has a saph loom in the car.
The central locking motors mount to the door in a different position than original 3 door ones. All I did was transfer and mesure the original position on the saph door over on to the 3 door.
And are you sure that you defo have cable operated ones cos I thought they were all push rod?

Luke