<div id="diagram"></div>
<script>
  var Shape = kendo.dataviz.diagram.Shape;
  $("#diagram").kendoDiagram();
  var diagram = $("#diagram").data("kendoDiagram");
  var shape1 = diagram.addShape( new Shape({x:100, y: 100}));
  var shape2 = diagram.addShape( new Shape({x:300, y: 100}));

  var connection = new kendo.dataviz.diagram.Connection(shape1, shape2, {
    hover: {
      stroke: {
        color: "orange",
        width: 2
      }
    },
    selectable: false
  });

  diagram.addConnection(connection);
</script>