[russellw]

Twonk is probably the right word.

Let's start with the connectors at the back of the lights. There should be a 7 pin plug as follows:

Green/Black - High Beam +ve
Purple/Orange - Low Beam +ve
Orange/Blue - Sidelamp +ve
Orange - Indicator +ve
Blue - Levelling Motor feed (where fitted)
Black (two of) grounds - one for each of high and low beam by the look of the diagram.

If you have different colours let me know as there are two different specs for the headlamps.

Cheers
Russ