Hello Erb,
The pioneer tool storage brackets on the running boards are hard to photograph without removing the Gas and Water cans. Here are two photo's and an illustration from an engineer handtool manual that explains the difference between a Mattock and a Pick (two different tools).
The late CCKW TM 9-801 manual has the same illustrations. The correct tool for the CCKW is a Mattock with the flat blade like an adz on one end. The bracket to secure it is a wide flat horizontal piece at the forward end of the running board behind the gas can bracket. The pick will not fit and is not the correct tool. The military part number on the Mattock is 41-M-720. The "M" indicating "Mattock" and not "P" for "Pick".
The straps can be either leather or webbing. The bracket in the center that secures the pointed end of the Mattock has a small "L" shaped rod, threaded on one leg and is sucured tight with a special wing nut that has only a single "wing". The one shown here is not correct. (Not Mine) A standard hardware wing nut like the one shown with twin wings work OK but it should have the correct single one. They are the same for the two hold downs on the battery box.
I can get some better detail photos from my truck if you need more detail.
I like this arrangment better that the later addition of the universal bracket on the hood side panel.
Be a good trooper and tell the lads that it is a "Mattock" and not a "Pick"
Cheers
Cat Man