Farm jacks have a flat base how would it hook into this bracket?I think Rob could be right. Farm Jack bracket
With a little bit of fabrication it would be possible to turn it into a jerry can holder. Would be just require a bracket making with a bar to hook into the bottom hooks and something at the top to allow the pin to secure it in place. That bracket could then be welded/bolted to a jerry can holder to make a quick release fuel can mount.An outboard motor might be more the kind of thing. I'm starting to think it might be something very specialised. I think the vehicle might have been used at an airport once so maybe it could be some bit of unusual equipment. A pity, I was really hoping for some kind of extra fuel carrying bracket.
30cm tall and about 8cm across. It is mounted with the bottom hooks just above the rear cross member.