3. Fasten the white fixture lead to the white wire in the junction box. Fasten the wires together with an approved fastener (wire nut). Starting about 1° below the fastener, tightly wrap the connection with electrical tape so that the connections seals the end of the fastener. A WARNING Make sure that there Is no exposed wire or strands that could cause a dangerous short cultural! n Electrical tape Approved fastener (wire nut) 4. Connect the black fixture lead to the black wire in the junction box.