The diagram linked shows a stamped location on the frame with an arrow that reads "Forward Control..."
It shows a different location for Flat face cowl and another location for All Others. The latter applies most of us regular folks.

"It's just a phase. He'll grow out of it." Mama, 1964

1956 Chevy 1/2-ton 3100
1953 Chevy 6100 "The Yard dog"
1954 GMC Suburban Now with a new proud owner.