Radarr/UI/Settings/Indexers/CollectionTemplate.html

<div class="row">
    <div class="span12">
        <button class="btn btn-success x-add">Add Newznab</button>
    </div>
</div>

<div class="row">
    <div class="span12">
        <ul id="x-indexers" class="indexer-list"></ul>
    </div>
</div>