Carefully remove the top section being careful not to break any bulbs or protruding parts.

Find the wires that connect to the power switch and carefully unplug them, making sure not to pull too hard.

There should be four wires to remove, two white and two black. Be sure to keep track of where each was connected, since you will have to reconnect them in the same way. The picture show the white wires on the left and the black wires on the right of the switch.