GAIN Logs With Battery Voltage

Hello everyone, I want to see the behaviour between battery voltage and gain percentages.Could you please help me to see both of the values in the same graph?
Every tool will be fine for me not just this site.
https://drive.google.com/file/d/1H5WvgS9_t-omPiN4dGVl8u4n3azh-_Oy/view?usp=sharing
https://drive.google.com/file/d/1jfr4mPs-jdPfZeJjcep7tY0EqDwRsMmS/view?usp=sharing