It's too inconsistent with Dearborn. Sometimes they are found under the carpet, under the seats or under the trunkmats. It's uncommon to find one in a Dearborn or San Jose car. Metuchen cars were usually taped to the main harness.
I suppose if its there I will find it eventually. The car is scheduled to go to the body shop next week to be stripped. I just thought I might do a little preliminary digging. I removed the back seat tonight and almost went crazy over what turned out to be one of those brown paper towels you get at the filling station.