The figure shows the installation locations of the parts and their designations according to the spare parts catalog.
We look at the figure and the table shows the decoding of the part.
The propeller shaft has two joints and a sliding spline connection.
The propeller shaft forks are attached to the steering screw and the steering column shaft with wedges.
ZIL-5301 brake hydraulic pressure regulator - catalog
The regulator is installed on the ZIL-5301 vehicle with a brake drive system divided along the sides.
Regulator repair is discussed in the article - "ZIL-5301 hydraulic pressure regulator"