The ground wire should be connected to the green screw terminal. This is a standard color code used in electrical wiring to identify the ground connection.

Here's why it's important:

* Safety: The ground wire provides a path for electricity to flow to the ground in case of a fault. This helps prevent electrical shock and potential fire hazards.

* Proper Functioning: A properly grounded system ensures that electrical devices operate safely and efficiently.

Important Note: While green is the standard color for ground terminals, it's always best to confirm the color coding by checking the device's documentation or consulting a qualified electrician.