For whatever its worth...
Both My Dearborn '65 (June) and Dearborn '66 (July) convertibles have absolutely nothing in the middle holding up the Trunk Torsion Rods..
You posed a great question though... Thanks for asking it!
PS: I believe that there was only 1 wrapped rod which was the rod mostly on the bottom since both rods cross.
Both my Dearborn convertibles only had one Anti-Squeak/Anti Rattler wrap and it was on the most bottom rod on both vehicles. The top rod is left bare I believe.
)
Tony K.