Yes, you can choose the same option since there are no other alternatives. There is a section to enter the application number starts EP-----, which ensures it is automatically attached to your application. You will receive confirmation within two days stating that the document has been successfully linked to your application similar as below.
'This is to confirm that the supporting documents you submitted were added to the file. While they may not be visible in the
IRCC secure account or portal due to technical limitations, rest assured that the documents are available for officer review. '