I have a 1958 and as I was cleaning my windows I just noticed that it only has heated glass on the drivers side window in the cargo area. The passenger side cargo window is devoid of heating elements. Do others have heating elements on both sides or just the drivers side? Seems pretty strange it would only be on the drivers side, even more so given the passenger side is the side the driver can see out. Or did they mess up on mine and put the wrong glass in?