On automated assembly lines in motor vehicle manufacturing, the connection box with LED indicator is installed at the end of electrovalve circuits to signal operational status. This component serves as a critical interface, ensuring reliable electrical connectivity while providing visual confirmation of system function. During the final stages of vehicle assembly, it is fitted to pneumatic control systems that manage actuation of robotic arms and press tools. The LED indicator alerts operators to valve position changes, enabling real-time monitoring of pressurized components such as door hinges and suspension linkages. In high-speed production environments, this device supports precise control and fault detection, reducing downtime and enhancing line efficiency. Its placement within hydraulic and pneumatic systems allows for quick diagnostics, supporting maintenance teams in identifying and resolving issues without halting the production flow. The integration of this part into vehicle manufacturing equipment ensures consistent performance and operational clarity in complex assembly processes.