I’m trying to install new smart switches (box and switch oics included) where some old timer switches are currently installed. The new switches require a neutral wire and ground. Is the bundle of gray wires in the box the neutral wires and the bare (albeit with paint or drywall on them) wire the ground? If so, since my current switches don’t use a neutral or ground, can I just unravel any of the neutral and ground strands and use them in the new switches? Thank you for any help.