What are electrical and non-electrical accessories? How do I calculate the value of these accessories?

• Electrical accessories: Electrical accessories cover any electrical part and/or electronic equipment that is not factory fitted with the car, such as fog lights. The value of electrical accessories will be as declared by the insurance provider.
• Non-electrical accessories: Non-electrical accessories cover any non-electrical part and/or non-electronic equipment that is not factory fitted with the car, such as mag wheels and leather seats. The value of these non-electrical accessories will be the same as their invoice value.