someone gutted out the heat on car. some questions.. need help

my 340-4 speed has been stripped completly of the wiper system and heat system.

i have all the stuff to reinstall, but i would like to just block all the heat stuff off.

what do i do to block off the big round holes under the dash where the vents came through? i beleive that these two hole go to the vent that is on the outside of the car. i guess you caould call them gills, right near the end of the hood.?
Author: admin