[YENKO DEUCE REGISTRY]

Originally Posted by Nova Pete

Mine have those also. But not sure on the option. Maybe it was part of the SS package.

I believe they were standard with the bucket seat option. If you wanted bucket seats in a Nova it also required the deluxe interior option which upgraded things like the door panels, carpeting, bright trim on the dome light, day/night mirror, cig liter, glove box light, dome switch in the pass door jamb, etc...along with those seat belt holders, but I think the other two buckles go into some plastic clips that go on the bucket seat bases - not sure if these plastic ones were factory though, might have been an accessory.