Hello,
I am not in possesion if He 219 DB 603 engine manual, but is this not "engine-armour" (plate) in front of motor? Seems be rather rusty to be of aluminum ... but it seems smaller than item (and them holes) visible in this picture taken from NASM by "mike.kukavica" found at Flickr.com
http://www.flickr.com/photos/mikekuk...n/photostream/ In case it does not show to TOCH readers on Flickr.com , the attached image (below) is this cut from same picture as in the link abowe. The arrow points to item in question.
Best regards
ed