Why Dodge?

This is the bottom of the bech seat out of the 1947 Dodge truck Im working on.
20220220_182712.jpg
Why the vent?


There is no Heat down there and no cab vent.
I dont get it...

(Is this the old version of heated / cooled seats?)

:)

I think its cool I just dont understand it.

Anyone know why Dodge spent the coin on this?