Danng man why did you connect the wires by twisting them and then wrapping it in electrical tape? You should of soldered and heat shrink the wires instead. I feel just twisting wires together isn't a good solid connection. There is chance those wires could be pulled apart and electrical tape you know when it gets especially if you live in hot climate areas they leave black sticky residue on the wires when its heated up. Heat shrink tubing of wires is cleanest way of covering exposed wires.