To solve the problems of time-consuming, labor-intensive, harmful, and high cost caused by the current manual welding process for electrical products, it is convenient, quick, simple, and safe to switch to direct plugging, reducing the human and material costs of enterprises, and eliminating the harm of lead to human bodies. It can be widely used in vehicles, central air conditioners, printers, photocopiers, gas stoves, and other products that require maintenance and testing.