Unable to access the changed signal paramter when using a Connections type in QML

import QtQuick 2.12
import QtQuick.Window 2.12

Window {
    width: 640
    height: 480
    visible: true
    title: qsTr("Hello World")

    Box {
        id: box
        onExampleChanged: print("Box: ", example)
    }

    Connections {
        target: box
        function onExampleChanged(example) {
            print("Connections: ", example)
        }
    }
}

import QtQuick 2.0

Item {
    id:root
    property var example: "test"
    Timer {
        running: true
        onTriggered: root.example = "box"
    }
}