Hello,
The Model ID and the Bucket name are needed to be inputted as per Memsource requirements and you would need to check their documentation or contact their support.
As Music mentioned, the Model ID can be found in the Translation console and you can find
here a sample format that it can be referenced: projects/projectnumber/locations/us-central1/models/TRL3007727620979824033
In Google Cloud Platform, the buckets are referred as gs://mybucket but they can also be referenced as a
GCP resource. Memsource should clarify what format is needed for their application.
As for the Labels, these might refer to
a user-defined label needed to track the billing charges. This should also be clarified with Memsource.
Hope this helps.