yes, inside order-detail.tpl
just look for this line
<div id="order-detail-content" class="table_block table-responsive">
and after that line you the table. just add another th in the thead and another td to tbody.
you will also need to modify the tfoot colspans to match the extra column.
dont forget that
{$link->getImageLink($product.link_rewrite, $product.image->id_image, 'medium_default')|escape:'html':'UTF-8'}
only return the url to the image, so you will need to wrap it inside src tag