My 51 1 Ton has the same thing, brake handle mounted on the transmission activating cables in the rear brakes. Of course there is the intermediate crossbar.
Same is true on my '49 GMC FC250 (1 ton , dual rear wheels).
BC 1960 Chevy C10 driver 261 T5 4.10 dana 44 power loc 1949 GMC 250 project in waiting 1960 C60 pasture art Retired GM dealer tech. 1980 - 2022