All Ortofon cartridges have a color coding of the terminals, indicating red and green for right channel, respectively the hot and ground terminal. White and blue for left channel, respectively the hot and ground terminal. Green terminal will always be used for grounding the cartridge housings or motor-system whenever connected inside the cartridge. We recommend connecting lead wires to the cartridge and headshell before mounting the cartridge on the headshell. Please remember correct orientation of the leads. Ortofon cartridges' terminal PINs diameter is 1.2 mm, while Ortofon headshells' PINs diameter is only 1.0 mm.