Hi Peter, On mine there are Five screws that hold the panels on, mine is an older model but I don't think the new ones are any different. With the panel off you can see the gearbox and worm drive, you should also see Four wires coming up from the base, on older models like mine they are soldered into the circuit board, on newer models there is a little plug attached to the four wires and that plugs into the circuit board. All I really need is the little plug with a short length of wire left on it so I can solder it on to my existing wire. If yours is the plug type and you no longer require it I would be interested in obtaining it in exchange for some beer tokens. Many thanks...Colin..