QML, Refer to a rectangle that is repeated by Repeater, to change the text

Hi all, I have this code in QML is a grid of 40x40 pixels square, and each displays text "¿...?", when click on a square it changes the text according funcion.checkPos (index). My problem is that apart from changing the text of each square with one click, I need to modify the text of each square after receive signal from Qt. The signal is perfectly connected to the code QML and it is emited correctly.

From main.cpp I connect the signal with slot of QML

Code:

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QObject::connect(&Clase,SIGNAL(nuevaPalabra()),rootObject,SLOT(modificarTexto()));

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This is a QML code with the slot modificarTexto():

Code:

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function modificarTexto(palabra) {  texto.text = palabra}
 
Rectangle{
            id: rectangulo1
            pos.x: 0; pos.y: 0
            width: 641; height: 401;
            Grid {
                x: 1; y: 1
                rows: 10; columns: 16; spacing: 1
                Repeater {
                    id: repeticion
                    model: 160
                    Rectangle {
                        id: rectangulo2
                        width: 39; height: 39
                        color: "blue"
                        Text {
                            id: texto
                            text: "¿...?"
                            font.pointSize: 10
                            anchors.centerIn: parent
                        }
                        MouseArea {
                            anchors.fill: parent
                            onClicked: {
                                texto.text = Clase.checkPos(index);
                            }
                        }
                    }
                }
            }
        }

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The problem is in the slot modificarTexto, since, QtCreator shows that texto.text does not refer to anything or not found it, i.e. no references found, How can I to do reference individually to the text of each square, since, it is repeated the same square with Repeater? How do I indicate that the text shall it changes after recieve the signal from Qt? I don't know how to do reference a square determinate of the grid.

I hope someone has the answer!
Thanks in advance