Multiple File Provisioner in Json Terraform

"provisioner": {
    "file": {
        "connection": {
                "private_key": "${file(\"/KeyPair.pem\")}",
                "user": "id"
        },
        "content": "${template_file.x1}",
        "destination": "/path/to/dest1"

    },

    "file": {
            "connection": {
                    "private_key": "${file(\"/KeyPair.pem\")}",
                    "user": "id"
            },
            "content": "${template_file.x2}",
            "destination": "/path/to/dest2"
    }
}

Here I have a JSON Terraform scriplet. I understand I will have to merge/group the file provisioners but I am not too sure how to do that

I keep getting errors whilst validating.

SyntaxError: Duplicate key 'file' on line 78

Do I have to use inline feature?

I think this may be correct. Can anyone confirm?

"file": {
    "connection": {
        "private_key": "${file(\"/KeyPair.pem\")}",
        "user": "id"
    },
    "content": [
        "${template_file.1}",
        "${template_file.2}"
    ],
    "destination": [
        "/path/dest/",
        "/path/dest/"
    ]
}