Heltec V3- connect a external display on the 2nd I2C BUS

Hello, I am slowly getting to grips with the new Heltec WifiDev V3. However, I have an issue for which I have not yet found a solution.
I would like to address the onboad display via the first I2C bus and another display via the second I2C bus using the U8G2 library. Unfortunately, I have too little experience with the wire library, so I need your help here.
Thank you very much!

See