I am doing a minor reno in a new house. I took out a wall and in it was two strands of 12-2 that went to one outlet. That wiring will not be used anymore, I don't want to splice into them or run them to a different location. I can not tell how the wires run back to the box so I can't pull them out so I want to hide then in the floor. Can I just cap it with some wire screws? Or should I put a box around it? The box is less favorable because I would have to cut a hole in the sub floor to hide it. But is that the safer option? Thanks J