Hi.i need some help.i had outside security light with separate pir sensor fitted out side .connections to light and pir are in water proof box.in it is plastic connecter strip.old hologen was broken so i wanted to replace it with led one.disconected old light but forgot to make note.at presant wiring is like this.2 core and earth comes out of wall into box.conected brown to one terminal blue to another and earth to another one.sensor has 3 core plus earth.colours are brown black an blue and of course earth.brown is connected with brown comming out of house.how the other two should be connected.of course light side can be paired with switch live and nutral thanks.