Strange (FACTORY) Holes in Trunk Lid

Does anyone know the purpose of the two holes in the bottom of the trunk lid ('69 Barracuda, Fastback). I've had issues with an exhaust smell when driving and I found these two hole on either side (and below) of the license plate (see pics). At first I thought they might be holes for a rubber bumpers but they don't hit against anything. Then I thought that maybe they were weep holes for water to get out of the trunk lid (when closed) .....but how could water get in the trunk lid?? Either way these holes allow exhaust to get sucked into the truck area then into the whole car AND IT STINKS!!! In the pics you can see these small square rubber pieces I have glued to the hole to keep exhaust from entering. If they are weep holes to drain the trunk lid how did the manufacturer keep exhaust fumes out of the car???

Confused,
Treblig