Where can I find the documentation about 1:1 Matched Reference ?

When you you choose 1:1 Matched Reference a little “i” icon appears to the right. Click it for a pop-up explanation.

what is “Main_Brand” referring to in Bubble

I have a data type called Main Brand. All of the brands are entered there.

is “Main_Models” a list of Bubble Ids from Models table

Main Models is another custom data type. I just enter all of the models so that bubble can access them quickly.

when you do “Detect Data” you are supposed to receive a List of Models

I’m not sure I understand the question. I’m not really a developer so some of your question may be lost on me.

share your workflow both in Parabola and Bubble

Oh , man, it’s pretty complex at this point. Probably unnecessarily so. I upload all of my CSV files to Dropbox. The Parabola flow starts by deleting my entire database in Bubble, except for users. Then it uploads all of the CSV files to Bubble. The trick was getting the JSON correct.