There should be thru holes partway down each stake pocket.
Geez, I always learn from this website. I just ran out to check my '54 truck. Sure enough, the holes are there. All the while I had thought they were just holes.
54 Chevy 3100 Deluxe 3 speed on column. Keeping original as possible but changed to 12 volt system. JB Weld..."I put that stuff on everything"