I HAVE JUST PURCHASED A NEW DOUBLE LIGHT SWITCH TO REPLACE MY OLD ONE. THE OLD ONE HAS THREE CONNECTION HOLES AT THE TOP AND THREE AT THE BOTTOM. THE NEW ONE IS DIFFERENT. IT HAS TWO HOLES AT THE TOP MARKED COMMON AND FOUR AT THE BOTTOM L1,L2,L1,L2. THERE ARE TWO BLUE WIRES, TWO RED, TWO YELLOW AND AN EARTH WIRE CONNECTED TO THE BASE. PLEASE COULD YOU LET ME KNOW WHICH WIRES GO TO WHERE AS IT IS UNCLEAR ON THE OLD LIGHT SWITCH?