For a new bikepacking setup on a drop bar bike, I went with an Oveja Negra Front End Loader/Lunch Box combination for a bar bag. They came with no directions/instructions and Oveja Negra had no info on their site. I eventually puzzled my way through to a working mounting but asked them if they had any actual instructions. They told me they were coming out with an instructional video.
It is now live on their Instagram page
here. I'd still prefer some printed instructions with pictures, but the video would have saved me some fumfering.