Does anyone truly understand aftermarket central locking and how the actuator wire up to the little C/L ECU

[Skiday]

Over the 8 years of my long term project I have had the aftermarket central locking working, and then I stripped the whole car down and now I have the little ECU box and I have actuators but I don't have the loom to connect them (somehow). I actually have two (different make) little ECUs and the wire colours for the C/L are the same: Orange (Or), White (W), Yellow (Y), Orange/black (Or/B), White/black (W/B), Yellow/ black (Y/B), then Red (R) for power Black (B) for neg and three others for trunk, lights flash & window closing. The main actuator has Blue (U) & green (G) for switching polarity, black for neg & a white and a brown for switching the other actuator. After some trial and error and trying to follow some very poor diagrams from Chinese sellers (who are no help for advice) I have the actuators working by wiring Or & Or/B to neg-, Y & Y/B to pos+ and W & W/B to the U and G of the actuators. It doesn't make any difference if the B from the actuator is connected to neg or not (??). I don't really know exactly what is going on inside the ECU switch box as the diagrams I have don't tally with my logic, but I don't really need to, all I really want to know is where do I wire the W & N of the main actuator back into the ECO so that when the main actuator is operated manually (by turning the key in the lock) it triggers the passenger lock as well. Any help much appreciated. Thanks