Landed a doosie of a deal om the Trumpy KMT-6. ($4). Couple questions. Parts 25, 26, 12 are showed assembled and mounted on the left front above the splash plate. Upper part looks like a pulley. Photos of the system do not show any sort of cable attached to the plows. (Also a pic of a Czech T-55 shows this on the right side.) Also, parts 2 and 3 look like a pulley of some sort but there is no mention of it in the instructions. Any clues?