Two rails have a TI INA700 digital power monitor circuit with connections to the rail series current sense resistor. This arrangement permits the INA700 to report the sensed parameters separately on the I2C bus. The rails equipped with the INA700 power monitors are shown in the power system table in Board Power System. As described in I2C Buses and Connections, the I2C1 bus provides access to the INA700 power monitors.
For connectivity details see the schematic, which can be accessed through the SCU35 Evaluation Board website.