My word; that's a deep dive into the cellars. Looking.....
Company service info doesn't recognise this level of detail for the LR model using K1.8. Rover is no more; aftermarket now supports all of those owners.
Turning to cumulative wisdom of those who were here during those days and are still here now;
To our understanding, the connector on the pigtail has three flat pins in a row. It's rectangular in cross-section. It has a moulding with two ribs on both long sides, one side close together, one side far apart (relatively).
Holding the connector with the far-apart ribs down and looking from the wiring side, so seeing the individual wires as they enter the 'back' of the connector moulding, pin 1 is the RH pin, pin 2 central, and pin 3 LH side.
In that context pin 3 is ground, pin 2 is signal, pin 1 is +12v.
It seems that the centre pin is signal, whether viewed from the pin side or the wire side of the connector moulding. Checking now if we have a view of polarity sensitivity...
It also seems the feature on the cam that the cam sensor sees is a step-up in diameter and a step-down in diameter 180' apart. It looks like a small balance weight, or a flange that's removed over half its' circumference. The sensor sees steel appear near to it, then disappear. The sensor signal will be a spike in one direction when it sees step-up in dia and steel appears, other direction when it sees step-down in dia.
So, if the collected wisdom turns out to be tosh but the sensor isn't fried then the signal will be wrong by 180' camshaft rotation.
Oh, did you perhaps get an engine harness on the donor motor? Guess not, or you'd have looked at that already.
More later...