通过设置data-url可以指定接口，data-url="{:url('ajax/upload')}"

<button type="button" id="faupload-local" class="btn btn-primary faupload" data-input-id="c-local" data-multiple="true" data-preview-id="p-local" data-url="{:url('ajax/upload')}"><i class="fa fa-upload"></i> {:__("Upload to local")}</button>