Meine Herren !
Italeri, Tamiya and Academy have and had 1/35 kits of german horse-driven Military Carts like medical carts, Gulaschkanone, etc.
From source photos I could'nt find any differences between these standard military carts of the Wehrmacht
und dem Kaiserlichen Heer.
So I think one may use them without hesitation as an ad to a diorama / vignette and so on.
bizz bald, Gunther