AOC-LPZCR2 User's Guide 2.2.1 Jumper and Connector Descriptions Jumper Description J2 Activity LED Connector J4 Buzzer Connector Connector Description J1 System Management Bus (I 2 C) (*See I 2 C cable connection on the next page.) J3 SCSI Mode (On: Enable) J5 Serial ATA Mode (SATA 2) Mode (On: Enable) J7 SAS Mode (On: Enable) (DS10-12, DS4),(DS5-8) Diagnostic LED Indicators 2-2