73 Dart Sport - What kind of gaskets go around the taillights?

The taillights on my buds 73 were put in with caulking. What should be there?

There's the inner plastic housing, then the red lens, then the body of the car, then the chrome bezel. Is there foam between the plastic housing and the red lens? Or just foam between the lens and body of the car? Anything between the body of the car and the chrome bezel?

I found this photo on ebay which shows a large white gasket...is that right? Anything else under there?