The flex-lamp is powered by 110V/24V transformer. The transformer case had cracked along the seam so I was able to open it and remove the electrical plug parts; I brought out the AC input wires through the rear of the switch box and affixed the transformer to the rear of the box with machine-screws. A plug-end of lamp cord from the switch box plugs into the metal electrical outlet box that provides all electrical power for the table . The lamp cord connects to the transformer output cord with a Molex-style connector.