Wow; Hermann you are an absolute star. There on page 818 is the answer:
Attached to the Brustschaltkasten are 2 sets of straps: one for the neck and the other obviously for the torso. (Whether or not it was used much I have no idea but I can now modify my crew figures accordingly).
Thank you so very much.
Brian, not a star, just googling with brain. And “a little” German language. 
Yes, I suspect the technical aspects in this Funkjagd would have been beyond me.
But thank you anyway. Armorama proves its worth (to me anyway) over and over again, just with the opportunity to grind away at the little details, that can make so much difference.
