Ok, it's not working with the proper connectors used as shown by EFLImpudence below. Presumably they would work daisy chaining round several lamps, ie 2 live and 2 neutral going in?
We have moved into a new house and I have just gone to change a spotlight that had blown when I found this! The bulb prongs are connected to the live wires via a block. On further inspection upstairs, I found some transformers with equally suspicious wiring so think each of the 9 spots are daisy...