Corps and Army level Service Corps Markings

[Michael Dorosh]

Did the red/green diagonal slash on corps and Army level Service corps unit signs in WW II go from top right to bottom left, or from top left to bottom right?

I see that divisional level units had the slash from top right to bottom left, but some web pages I saved from a defunct website show that corps and army levels had the slash the opposite. Was this an error? I am looking in Bouchery and see no comments on this either way.

Did divisional level units always get the direction correct, come to that?