69 Dodge Dart GT Trunk Trim

Hi All...A question from Australia.

Trying to learn more about the black ribbed trim on the backend of the trunk on 69 Dodge Dart GT's. I'm assuming the top and bottom stainless trims are separate to the black ribbed central piece as in the picture attached, is that correct? Our locally assembled Valiant hard tops only had the upper and lower trim pieces and were painted silver between them on high spec models.