Im trying to interface nRF52DK to Custome build acceleration sensor.

I want to use I2C communication. Are the pin connections mentioned below sufficient?
| LIS3DH | nRF52DK | other | Reason | |
| CS | 3.3V | Pulled high for I2C | ||
| SCL | P027 | 4.7kohm resistor to 3.3V | Pulled high for I2C | |
| SDA | P026 | 4.7kohm resistor to 3.3V | Pulled high for I2C | |
| SDO | ??????? | |||
Should SDO pin be connected to something? and what is its exact purpose? i did read the LIS3DH document. But still a bit unclear.