Traffic source - how to populate

Question:
How do you populate the traffic source?

Product:
Analytics - Wix Studio

What are you trying to achieve:
There is a section on Wix analytics that I can make a sales report by traffic. I would like to see what caused the sales. I can see the data in Google Analytics, but I can’t pull the total revenue. What is the best way to do this?

What have you already tried:
I tried downloading the file as is, and mostly are direct or referral with not enough useful info

Additional information: