The first thing you need to do is make sure that the bulbs are all working properly and that the wires are not broken or damaged. Once you've confirmed this, you can begin to connect the pre-lit tree lights. Start by finding the plug and making sure it is correctly plugged into the outlet. Then, find the main wire of the lights and plug it into the plug. Finally, gently wrap the wire around the tree in a spiral pattern, making sure that the wires do not cross or tangle.