Where does the brake pedal return spring attach on a 1946 Chevy 1/2 ton pickup?

It looks like it could attach to the overly long pedal-to-master-cylinder-rod-bolt, but if this is the case, what about the other end? It seems that the clutch fork is in the way.

The replacement spring being sold for a 1946 Chevy 1/2 ton isn't very long, and has an attachment loop at each end of the spring, without any long-and-straight sections to the spring.

For a spring of only about 4 inches or so, I can't see how it attaches to the brake pedal, or the engine or frame.

Any suggestions would be greatly appreciated. Thanks.