I think it would be enough for you to just add "api/v2" in the URL name.

Anyway I have just pushed a fix both for this analyzer and the connector in the develop branch. If you could please try whether that works or not, I don't have a local YETI instance:

• I added "api/v2" in the URL composition in the analyzer
• I added "api/v2" in the URL composition in the connector + the final missing "s" at the end

git checkout develop
./start test up -- --build

We have two issues with YETI,

One is the connector #2120
Second the analyzer and here are many changes in the API to search for observable. #2309

see also the open api json file from YETI

yeti_openapi.json

thanks for reporting but please remember that we rely on the community help and we are not here to maintain and solve all the use cases, we are not paid for that. So please, we are talking about few lines of python code and a yeti instance you already have in place, submit a pull request if possible. We don't have the time to do that on our own.