The Seeed ADS1115 4xADC Pi Hat Grove Connector

What do I solder or connect to have I2C serial data on pin 2 which is labelled NC:I2C serial data in the photo from your site. I can easily jumper I2C clock to AIN0: Analog pin0. I wish to use the grove connector as an I2C cable connector to the RPi. I see that these two signals are available on the solder bridges for changing the I2C address.