Firstly, it seems that you may have forgotten to press the large "Authorize" button in the connector window after setting it up. With OAuth, it is necessary to complete an interactive authorization in order for EasyMorph to obtain the access token before utilizing the connector.
Secondly, it appears that you have entered the wrong Base URL. The Base URL should be the URL for the API to which you will be making requests, rather than the URL for OAuth services like on your screenshot.
For Google Ads, the Base URL should be something like https://googleads.googleapis.com/v14.
Thirdly, please make sure to enter both your client ID and client secret, as both are required. Additionally, I am unsure about all the parameters you have entered - are you certain that they are all required (such as private key, etc)? According to the Google Ads API documentation, I couldn't find any reference to them.
Furthermore, please note that in order to access Google Ads, you may additionally need to apply for a developer token. You can find more information on how to obtain a developer token at the following link: Obtain a developer token | Google Ads API | Google for Developers
Lastly, there is a sample Google WebAPI project available that includes a pre-setup connector for the Google API. You can repurpose this connector by simply changing the Base URL to Google Ads API and entering your credentials (client ID and secret).
You can find the project at the following link: How to import data from Google Search Console