Here's a pic of a mockup done for the hood sides of my 31 on 32 rails roadster.
Photo shot from inside the hood - as you can see - and shows the wire spring mounted backwards from most Dzus installations.

The aluminum piece is a stand that bolts to drilled and tapped holes in the top of the frame.
I like to do it this way instead of welding a piece onto the frame.

The rectangular tubing you see was used as standoffs to get things spaced out properly.
Nice thing about the Dzus captured fasteners - as well as the loose ones - is there are a couple of lengths available in either style.
The long ones are .050 longer than the short ones.
Makes life easy if you want a tighter or looser fit depending on the cowl welting and other factors.

There are commercially available sheet metal formed tabs for the springs and a lot of guys weld these to the cowl lip sheetmetal.
That works well too, but the first time I used the aluminum stand was on my glass 32 roadster.
It worked so well that I'm doing it again on the 31.

Front Dzus mounts are a little different as well.
I'll post a pic of those next.