I end with this first photograph, which is very interesting from a uniformological point of view.
These two men, helmetless, show another detail that sets them apart from their companions : they are wearing the "paletot" (a tunic with two rows of buttons) under their open coat.
In 1939-40, in field uniform, the basic infantryman did not wear the tunic, but a shirt under the coat (and a tie for white men).
Members of "les Chasseurs alpins", members of "les Corps-francs" (commandos, raiders), fortress and campaign artillerymen, engineers, specialists (workers, mechanics), horsemen and mounted soldiers wore the tunic, without coat... as well as the tankers and soldiers in motorised units (still rare ; armored cars).
The black man is wearing the "paletot" of the Senegalese Corps (see the large yellow braid on the collar). The second one, of North African ethnic type, is wearing the "paletot" of the Colonial artillery (without braid). They apparently put on the coat, unbuttoned, at the time of capture.
So, they were probably not troopers of 1st line infantry, but African drivers, mechanics or "artilleurs de la Coloniale".
That's all for me... and with the uniform boards of the link (chéchias, chèches, bérets), we will be able to give the WGA Frenchies some style, not ?