Some of our brushless gimbal controllers use molex style connectors between the main board and the IMU sensor. The MPU6050 chip that we use that has 5 inputs, but we only need to use 4 of them. So you will need to connect your cable to the IMU sensor as shown in the image below. We only need to use the GND, 3.3V, SCL and SDA pins from the IMU sensor. The INT pin is not used.
If you have any questions please let me know!