i purchased a varilight multi-way touch dimmer to replace a switch in my lounge the dimmer has 3 terminals ( ~/ . S . live) the existing switch has Common with 1 red wire connected... L1 with a red and a blue.... L2 with a red and a yellow.... would i be right in thinking that common go's to live... L1 go's to ~/... and L2 go's to S ??.............please help ...there is 2 switches to control one ceiling light !!