Help needed - Any one familiar with Tissart brake Set-up? I'm confused...

I'm having a time of it figuring out the friction brake assembly on my new to me LeClerc Tissart without instructions (as we do). Need a favor - would you be willing to take a few pics of the brake drum end screwed into the frame and the other end connecting to treadle release, spring etc? There's a chain there - is it used? How? I'd be really glad to see this as I'm probably missing a part or 2 here. Thanks in advance for any help you can give, Cosima22.