With all due respect, Fontyyy, according to the wiring diagram (which I have in front of me as I type this), and the 4 GPS switches that I have sitting on the bench in the shed, there are 6 wires to the main connector, all light green, with thin coloured traces W, Bk, Y, Gn, Br & P (6th to 1st gear resp), and a single light green wire with a red trace for neutral.