This is a universal circuit board with two red LEDs for use with the new generation UIC-x and TEE cars in the Märklin H0 program (car length 28.2 cm / 11-1/8").
2 permanently attached connecting wires.

A 73400 lighting kit or, depending on the type of car, a 73404, 73405, or 73406 pickup shoe / ground spring power feed set is required to hook up the 73407 marker light kit.