“As an engineering professional, imagine you are tasked with designing a liquid metal siphon system to harvest molten neodymium from an electrolytic cell. Keeping in mind the specific engineering parameters, such as temperature, viscosity, and flow rate, could you please draft a detailed diagram showcasing the key components and their connections? Additionally, how would you address any safety concerns related to handling the highly reactive neodymium metal and ensure efficient extraction from the electrolytic cell?”