How can i relate two models in EmberJS with ID

I have two JSON files. How can I relate the two JSONs files.

{
    "data": {
      "id": "in",
      "type": "product-catalogue",
      "relationships": {
        "products": {
          "data": [
            {
              "type":"group1",
              "id": "in-group-1"
            },
            {
              "type":"group2",
              "id": "in-group-2"
            }
          ]
        }
      }
    },

and few details of group1 and group2 model is attached in included part (ID remains the same).

I have the another JSON's for group1 and group2 describing the complete details with same ID.

"data": {
    "id": "in-group-1",
    "type": "group1",
    "relationships": {
      "sections": {
        "data": [
          {
            "id": "in-header",
            "type": "header"
          },
          {
            "id": "in-features",
            "type": "feature"
          },
          {
            "id": "in-pricing",
            "type": "pricing"
          },
          {
            "id": "in-toc",
            "type": "toc"
          }
        ]
      },

How can I relate the two jsons.

I am using the polymorphic relation for different type in data.

Eg - products is my base class and it will extend for group1 & group2.

product-catalogue: hasMany(''products)

now I have the group1 and group 2 data loaded. How I can load the details JSON now.