Buildsheet location?

On my 68, there were a few scraps left under the front seat. There was also tape on the back of the glove box where one used to be.

On my uncles 74 Dart Sport, I found one under the back seat. It was for a Duster though. My uncle then found one under the front seat. That one was for his car. He never checked to see if there was one on the back of the glove box.