44 Intel® Server System SR1680MV Service Guide
Figure 52. Locations of Connectors and Pin 1 on I/O Board
Cable Connections
You can get a clear picture on how to connect the cables from the following figures.
Before connecting the cables, you must make sure there are no existing bent pins because
they will affect signal transmission. With the Pin 1 location and fool-proof feature, you
can link these cables correctly and conveniently. There are two ways for you to judge how
to connect the cables:
1. When there is no fool-proof feature on this connector, you should connect the red
margin of the cable to the pin 1 location on the connector.
2. When there is a fool-proof feature on the connector, you can connect the cable
according to the fool-proof feature.
This section contains figures showing cable locations and descriptions of the connection
procedures.

System Fan Cables

System Fan Cables
Connect the 6-pin system fan cables from the system fans to the corresponding system fan
connectors on the I/O board.