At one time describing oneself as “Irish on all the corners” mean you had four Irish immigrant grandparents. On the short sides the L-shaped brackets are again six inches from the edge and 12 inches apart on center.
I had 4 (four) 12 inch long pieces of rope so I drilled two holes in each end piece in order to use the rope pieces as handles. Also on on the lid – not shown yet
and a simple fixture – a hose clamp – on the inside