konsole/data/layouts/1x2-terminals.json

{
    "Orientation": "Vertical",
    "Widgets": [
        {
            "Orientation": "Horizontal",
            "Widgets": [
                {
                    "SessionRestoreId": 0
                }
            ]
        },
        {
            "Orientation": "Horizontal",
            "Widgets": [
                {
                    "SessionRestoreId": 0
                },
                {
                    "SessionRestoreId": 0
                }
            ]
        }
    ]
}