That white and yellow wire was connected to the two purple wires via the wire connector immediately above it, sitting next to the yellow and black wires. It snapped off with me moving it around to take the pics.
I will take some more pics of the relay or whatever it is, only problem is that the writing is in German. There is a diagram on the side of it though which may help to identify what it actually does. There is also a bit of a diagram on the top, you might be able to open the pic and zoom in on it a bit. I do have higher res. pics available, I just can't attach them to the post due to size.
I did try adjusting the dial on top of the relay but it made no difference at all.
