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Carefully remove the sconce from its packaging and identify the wires: typically a bare copper or green wire (ground), a white wire (neutral), and a black wire (hot). From the electrical box, you will find similar wires. Twist the bare copper/green ground wire from the sconce together with the ground wire from the house, securing them with a wire nut. Repeat this for the white neutral wires and then for the black hot wires. Ensure each connection is tight and secure by gently tugging on the wires after twisting them together and applying the wire nut. Tuck the connected wires neatly back into the electrical box, being careful not to pinch them.