What are SCL and SDA connections on a 3dr GPS?

Can someone kindly tell me what they SDA and SCL connections on a 3dr GPS module are please?

I am trying to connect an old 3dr GPS module to a new diatone mamba flight controller. The mamba only has four connections for the GPS which are GND, 5V, TX and RX. Does anyone know If I wire it up to the 3dr GPS without the SDA and SCL connections will ardupilot still be able to use connect to and use the GPS? I have attached wiring diagrams.
Many thanks in advance.


I2c connections for the compass. You need a compass. That board has I2c pads doesn’t it?