Define resources by using other supported properties in AWS SAM

For both source and destination resources, when defined within the same template, use the Id property. Optionally, a Qualifier can be added to narrow the scope of your defined resource. When the resource is not within the same template, use a combination of supported properties.

When you define a source resource with a property other than Id, use the SourceReference property.

AWSTemplateFormatVersion: '2010-09-09'
Transform: AWS::Serverless-2016-10-31
...
Resources:
  <source-resource-logical-id>:
    Type: <resource-type>
    ...
    Connectors:
      <connector-name>:
        Properties:
          SourceReference:
            Qualifier: <optional-qualifier>
            <other-supported-properties>
          Destination:
            <properties-that-identify-destination-resource>
          Permissions:
            <permission-types-to-provision>

Here's an example, using a Qualifier to narrow the scope of an Amazon API Gateway resource:

AWSTemplateFormatVersion: '2010-09-09'
Transform: AWS::Serverless-2016-10-31
...
Resources:
  MyApi:
    Type: AWS::Serverless::Api
    Connectors:
      ApiToLambdaConn:
        Properties:
          SourceReference:
            Qualifier: Prod/GET/foobar
          Destination:
            Id: MyFunction
          Permissions:
            - Write           
  ...

Here's an example, using a supported combination of Arn and Type to define a destination resource from another template:

AWSTemplateFormatVersion: '2010-09-09'
Transform: AWS::Serverless-2016-10-31
...
Resources:
  MyFunction:
    Type: AWS::Serverless::Function
    Connectors:
      TableConn:
        Properties:
          Destination:
            Type: AWS::DynamoDB::Table
            Arn: !GetAtt MyTable.Arn
  ...

For more information on using connectors, refer to AWS SAM connector reference.