How to install automotive isolation battery disconnect rotary switch?

Installing a China cut off isolation battery disconnect rotary switch in a car is equivalent to installing a total relay on the car. When the ignition switch is turned off, the power of the whole car is cut off, which can prevent the car battery from leaking.
Car battery is also called accumulator, which is a kind of battery. Its working principle is to convert chemical energy into electrical energy. Generally, what people call a battery refers to a lead-acid battery. That is, a battery mainly made of lead and its oxides, and the electrolyte is a sulfuric acid solution. It uses a lead plate filled with spongy lead as a negative electrode, a lead plate filled with lead dioxide as a positive electrode, and 22-28% dilute sulfuric acid as an electrolyte. When charging, electrical energy is converted into chemical energy, and when discharging, chemical energy is converted into electrical energy. When the battery is discharged, metallic lead is the negative electrode and undergoes an oxidation reaction and is oxidized to lead sulfate; lead dioxide is the positive electrode and undergoes a reduction reaction and is reduced to lead sulfate.