QUESTIONS : Find element in Model

I have custom component and it render below html, I want to update value of h4 tilte and other element on trait changed, but not sure how can I find h4 and other element in model (NOT in view) and change value via trait change. I have used below approach but does not want to access model via index. updateTitle : function updateTitle() { var title = this.get('title'); var linkModel = this.get("components").at(0); if (linkModel) { var titleContainer = linkModel.get("components").at(3); if (titleContainer) { var h4 = titleContainer.get("components").at(0); if (h4) { h4.set("content", title); } }...