I have a two gang switch in a bedroom, one gang goes to the ceiling rose the other to a walk in cupboard light which is operated by a pull cord and will only work if switched on at the two gang switch. I have recently installed down lights and want to put a dimmer switch on so my question is, because I want to keep the cupboard light and it is switched in the cupboard is there a way at the back of the 2 gang that I can connect up so as to remove the cupboard light from the 2 gang thus allowing me to connect the dimmer??