I'm putting the interior back in a 2015 MS 85D (that someone else removed) and cannot precisely identify the piece in the attached photos (or find it in the Service Manual). It looks like some sort of sound or thermal insulation / dampening. The carpet of the car was completely removed, so it likely goes under there somewhere, or perhaps under the rear seat cushion ? The shape is leaning me towards it going in the front footwell area, but just thought I'd check. Many thanks for any insight you can provide.