LED connection / connecting cable for 3900 . / 3901 . black3714: Connecting cable 2 x 0.34 mm², black, length: 5,000 mm, for connecting the power supply unit (secondary) for the first lamp. With JST coupling for the lamp connection and the AMP plug for the connection of the power supply unit.3715 : Connection cable 2 x 0.34 mm², black, length 2,000 mm, for connecting one lamp with the other. .