Seems they just did a mirror image of the original incorrect CAD drawing before submitting the request to the 3rd party supplier .......

Conversation probably went something like this ( translated from German ) :
"Hey boss, just got those cowl pieces in from Acme, there's a slight problem."
BOSS: "WHAT !"
"Seems one of the holes is incorrectly located"
BOSS: "HOW COULD THAT BE ? SEND 'EM BACK AND HAVE IT CORRECTED."
"OK boss, will do !"
time passes ...
"Hey boss, Acme says they match the supplied specs, if we want a change we will have to pony up the $$$$ for the revision and it will take 6 more weeks."
BOSS: "WHAT ? WE CANNOT STOP PRODUCTION FOR THAT TINY LITTLE IMPERFECTION, USE THEM AS-IS WITHOUT THE GROMMET, NO ONE WILL EVER NOTICE"
"FIND OUT WHO DID THAT SPEC AND FIRE HIM !"
"WAIT, WE CAN REALIZE A COST SAVINGS BY PURCHASING 73,000 FEWER GROMMETS !"
"FIND OUT WHO DID THE DRAWING AND GIVE HIM A RAISE AND AN AWARD"
"OK, you the BOSS !"