Modifications

The both position are wired in parallele on the same I2C bus (so any position are right).  

The both position are wired in parallele on the same I2C bus (so any position are right).  

As this connector is quite small and more difficult to solder, we will start with its connexion pin.

As this connector is quite small and more difficult to solder, we will start with its connection pin.

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Load the iron tip with some solder and drop off the solder on the connexion pin first (solder should easily melt down on the pads and the pins).  

Load the iron tip with some solder and drop off the solder on the connection pin first (solder should easily melt down on the pads and the pins).  

Once the pin soldered, secure the Grove connector in place by applying solder on the sides of the connector.

Once the pin soldered, secure the Grove connector in place by applying solder on the sides of the connector.