ClouldFormation AppFlow template to select a list of fields

Question

I am trying to create AWS AppFlow Flow using CloudFormation template.

In the AppFlow the source is Salesforce and destination in AWS S3.

There are two requirements:

1. Select all the fields from source to destination
2. Select a list of fields from source to destination

For the first requirement the following CloudFormation template was developed and able to successfully generate the AppFlow flow by creating the CloudFormation Stack.

AWSTemplateFormatVersion: '2010-09-09'
Resources:
  MySalesforceToS3Flow:
    Type: AWS::AppFlow::Flow
    Properties:
      FlowName: app_flow_name
      TriggerConfig:
        TriggerType: Scheduled
        TriggerProperties:
          DataPullMode: Incremental
          ScheduleExpression: rate(1days)
          ScheduleStartTime: epoch_time
      SourceFlowConfig:
        ConnectorType: Salesforce
        ConnectorProfileName: connection_name
        IncrementalPullConfig: 
          DatetimeTypeFieldName: field_name
        SourceConnectorProperties:
          Salesforce:
            Object: salesforce_object_name
      DestinationFlowConfigList:
        - ConnectorType: S3
          DestinationConnectorProperties:
            S3:
              BucketName: bucket_name
              S3OutputFormatConfig:
                PrefixConfig: 
                    PrefixFormat: DAY
                    PrefixType: PATH
                FileType: PARQUET
      Tasks:
        - TaskType: Map_all
          SourceFields: []
          TaskProperties:
          - Key: EXCLUDE_SOURCE_FIELDS_LIST
            Value: '[]'
          ConnectorOperator:
            Salesforce: NO_OP

When it comes to second requirement all we got is the list of field names.

I tried creating the template by updating the Tasks but the Stack creation is failure with different error.

Can someone help me in creating the template for list of field names.

Note: The source and destination datatypes are not provided