3 Air Outlets - are they ALL connected to the blower?

I have modified this from LHD to RHD outlets but you can see that the extended top plenum with two outlets, the outlet on the top with the small spigot fits directly to the underside of the center dash outlet that you are questioning. The gap between the heater box and the dash is sealed with a circular sponge gasket.

Tx Goo9e
so let me see what I do..Original is def. a blanc..

Matthias

The center windshield defroster should locate on a blower housing hole on top like shown in the picture below---if the housing is the correct year---1973 and up single pod dash car. What year car is this? Dash is fiberglass and how it hooks up depends upon what type of heater box you have.

I should have a variety of pictures. Just need some additional information to help.

Kirk Hi
car is 4907 European GTS built per Vin in 11/1972, moved to the US in the 80ties.
The dash is fiberglass with leather. The big instruments are placed on a FLAT opening vs the hood style. It has 3 vent opening on the top. Suply for left and right are clear, the one in the middle is the one in question.
The heater/cooler box see picture..