MH-ET LIVE MAX30102 Heart rate Sensor

wanted to make sure I have understadn the pins correct for this device
I have connected Vin to 3.3V

what do I need to do in the 3-bit pad?

I want the SDA line will be 3.3V

Thanks ,

Take a look at this link, it shows how to hook it up. You do nothing to the 3.3V. It shows it as an I2C device. The only Vin I see is on the Arduino. It is best you do a bit of research on the web and reformulate your question.