как добавить кнопку в меню задач?

            let obj = BX('tasks_panel_menu_view_departments');
            let html = '<span>Код кнопки</span>';
            // insert after target
            BX.ready(function(){
                BX.insertAfter(BX.create('div', {
                    attrs: {
                        className: 'main-buttons-item'
                    },
                    html: html
                }), obj);
            });