ORIENT/modules/backend/behaviors/relationcontroller/partials/_button_create.htm

<a
    data-control="popup"
    data-handler="onRelationManageForm"
    href="javascript:;"
    class="btn btn-sm btn-primary oc-icon-plus">
    <?= e(trans('backend::lang.relation.create_name', ['name'=>trans($relationLabel)])) ?>
</a>