Found this on the OINP wesbite:
To authorize us to see your ECA results from:
Note: For the other organizations, no additional steps are required.
Please contact the ECA organization directly if you have any specific questions about the process for getting an Educational Credential Assessment or how to authorize and share your ECA results with us.
You must authorize the organization to share the results of your assessment specifically with the Ontario Immigrant Nominee Program (OINP). Authorizing the organization to share the results of your assessment with IRCC is not sufficient for the purposes of your application to the OINP.
So seems like you just need to contact MCC and not worry about WES. Try and get into contact with them.