First step is to dissemble the lampholder.

Screw the Bottom section (Cap) onto your thread.

Connect the earth wire (Green/Yellow) to the bottom section.

Connect the Live (Brown) and the Neutral (Blue) wires to the connection unit.

Carefully push the connection unit inside the bottom section, ensuring the indents align.

Take the top section (Skirt) and place it over the top of the connection unit, NOTE: the indents on the skirt must align up.

Then screw down the larger lock ring to secure the skirt into position.