Nope, that’s bollocks, the ‘Front towards Enemy’ is for night identification. Many munitions have features to allow them to be identified at night - 81mm Mortar WP has a stepped base, drill SAA has fluting in the cart case.
The curved shape would be more than enough to identify the direction at night.
Additionally, unless the soldiers were trained to braille style read letters in the dark, what would be the point of embossing the full FRONT TOWARDS ENEMY on it.
See what you are thinking about though, similar to those electric detonator boxes with the E embossed on the outside for identifying it in the dark.
Plus, my dit sounds much better than yours.