- 1 -nVIDIA N61P/N61S/N61V User's /Manual3.8 Internal Audio ConnectorsConnect CD-ROM or DVD-ROM audio out to the connector.3.9 IR Connection Header (Optional)Connect the IrDA cable (if available) to this IR connector. CD IN_1Pin No. Definition1 CD-L2 GND3 GND4 CD-RPin No. Definition1 VCC2 NC3 IRRX4 GND5 IRTX