dart convertible tension cables

I just got a new top for my 63 Dart. In fact I haven't even taken it out of the box yet. My Dart didn't have cables along with the frame. I tried to read everything I could on the net about convertible tops, that's where I first learned about these cables. And I did read in more than one place, and I confirmed this with the place I ordered my top thru, that the 63 & 64 Dart did not have these cables, and that widespread use of them didn't show up until later in the 60's & 70's. There is a cable on each side of the frame that is used to position one of the frame peices, but I think that's it. Just my 2 cents worth.