I'm seeing the top part of the spring shackle on that page (14/1.00) just behind the apron, if that's what you're talking about. It bolts thru the frame with a reinforcement inside the frame C channel. See the upper left figure on FAM Section 2 sheet 5.00.

Kevin
1951 Chevy 3100 work truck
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1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car)
Busting rust since the mid-60's
If you're smart enough to take it apart, you darn well better be smart enough to put it back together.