My problem is connection of different coloured wires to the new touch sensor in a bedside table lamp. This is the correct replacement unit.

The sensor has four wires - red, white, black, and yellow(which is the "earth" ).

Power input cable has two - blue and brown

Connection to the lamp(s) has two- red and white.

Please advise which colours are connected (via twist top plastic) to which.

Thanks in advance