GX6188
The figure below shows the GX6188 board connectors and jumpers followed by their description:

GX6188 Connectors and Jumpers
J2 – Front Connector: UUT channels connector, Ch 1-52.
J3 – Front Connector: UUT channels connector, Ch 53-104.
J4 – Front Connector: Global Bus connector.
J5 – Front Connector: Resources connector.
JP1 – Chassis Ground Jumper: Connects chassis to power ground