Ah yes they do have straps, I did not notice that, thanks for pointing it out. So that’s what bricoles were. I had no idea, I always thought the napoleonic sorts were arguing over some kind collar or sleeve flap or something. Cool beans.
There may be a more exact definition but bricoles were basically drag ropes/harnesses for the gunners to manhandle their guns. Not sure why it’s such a controversial subject TBH (other than the personalities involved in discussing the subject! 
)