A quick visual of the cab mounting system, all five points work together.
https://www.flickr.com/photos/advance-design_parts_co/12315088635/in/album-72157640522200463/
Improvements made in 1949 improved on the earlier concept shown below. This was learned directly from customers and a function of time.
https://www.flickr.com/photos/advance-design_parts_co/17244736685/in/album-72157651718017649/