Cloudforms : Using nested heat orchestration template with service catalog

Issue

• How to use nested heat orchestration template with cloudforms, I have a heat template solution that uses 2 different files,
  where I'm using a autoscaling group that calls an external yaml file like this:

 citrixcluster:
    type: OS::Heat::AutoScalingGroup
    properties:
      cooldown: 60
      desired_capacity: 2
      max_size: 3
      min_size: 1
      resource:
        type: ./work_node.yaml
        properties:

There seems no option to upload nested templates to cloudforms and connect them, how can I call the second template?