Hello Nik,
Thank you for reaching out. To assist you better, could you please confirm if my understanding is correct and you are looking to access the two accounts under your main account via API? If yes, you could use the OAuth credentials generated using the email address having access to these accounts (your main account). Please refer to this guide for detailed information on making calls to the Google Ads accounts using OAuth credentials. If you want to generate different OAuth credentials for these accounts, you could refer to the OAuth guide for details. If this doesn't address your concern, could you please elaborate more on the API request call made and the guide followed to create two connections? Please use Reply privately to author option if you wish to share the client customer id and other authentications details.
Regards,
Nikisha Patel, Google Ads API Team