reno/themes/widget_calibration/config/wibar_left.json

{ 
    "align": {
        "left": [
            {
                "widget": "widgets.tasklist",
                "screen": true
            }
        ],
        "center": [
            
        ],
        "right": [
            {
                "widget": "widgets.launcher"
            }
        ]
    },
    "vertical": true
}