The bolts on teh tracks are stylized and
crude substitutes for horns. A massive bolt in the middle should work. Think
Meccano.
Very useful close up photo Paul!
There is also a small roller on the rods, so the
horns don't eat up the rods, as George had pointed out to me months ago.
Attached jpeg from the rear of a T-34.
C
Not sure about the whole
bolt thing though. It did work with the type of track layout that a BT-7
had.
