I think it's the connector that goes to the logicboard. Don't exactly remember which one. There are so many flaws with the 5200/6200 line. The logicboard's design is hampered by the different 8/16/32/64 bit speeds all being corrected computationally by the CPU, the flaky SCSI controller, poor video capabilities, congestion between the memory and the CPU. They're just a poor performing machine all around.