RGB Encoder Breakout in Node Red

I have an I2C Breakout Garden with two Breakout RGB Encoders, one encoder is on its default address of 0x0F and I have changed the other encoder to address 0x0E. Running the Python example found on the Pimoroni site I can read the encoders and change the colour of the encoder knobs LED’s.
On the RPI I have installed node-red-contrib-i2c within Node Red and the I2C scan node reports the two RGB Encoders.
However both the I2C In node and the I2C Out node require a command, number of bytes and in the case of the Out node a msg.payload and I have no idea what these parameters should be.
Any pointers or examples would be very welcome.