Technical Mullins red cap trailer

Can some one who has an original mullins trailer send me a photo or two on how the rear panel is bolted to the box on the bottom. I have the rear piece but no bolts were furnished other than the chains on the sides to hold it in the down position

 

I had an original for 25 years. I might be wrong but isn't there a simple hinge point at each bottom corner that a bolt goes thru? Just checked the pictures I took when I had it for sale but they show nothing that would help you. Sorry

 

I stole this photo from the internet, might be of some help.

Mick