The battery access for these model trucks, going back I believe to at least 1937 requires removing the floor board. It is a real nuisance too, especially trying to avoid scratching painted surfaces inside the cab. I modified the new floor board I used on Sparky to make it only necessary to remove about half of the board. I now can access either the battery or master cylinder by removing one half or the other depending on which part needs maintenance, with less misery.
The battery tray shown, I think has an extra brace that I don’t recall off hand seeing on my ‘46. But, as shown should work fine. I will try to remember to check mine tomorrow.
