That's not my car, but my car has the same thing.
On an awkward plastic badge riveted under the pull handle, it says,
"Pull For Floor"
My assumption is that this sends AC/Heat through a floor vent, but I don't know. None of this works on my car (yet).
PANTERA INTERNATIONAL
A DE TOMASO CAR CLUB
Presents the De Tomaso Forums
The On-Line Meeting Place for De Tomaso Owners and Enthusiasts From Around the World
Clicking on the banner will take you to the sponsor's website.