DFR0975 camera and I2C devices

Hi all, 
 

I want to use my Firebeetle2 (DFR0975) with camera AND other devices on I2C. I tried different ways, but can't seem to get it working. I have I2C on pins 43(SCL) and 44 (SDA) to avoid conflict with internal camera I2C/SCCB. It might be wrong.On the I2C bus I have a screen on 0x27 and a SHT31 on 0x44. Can someone explain how to use both these and the camera, in Arduino IDE? 

Thanks in advance.