Graco Lajobi Kendal Convertible Crib "put drill back together" Questions

put together Freeport convertible crib. In figure one where should the barrel nut be placed at the top of back rail? Should there be a pre-drilled hole to place the barrel nut into, like the hole that

put together it chipped the wood on both ends of the one piece. I need to know how I can get a replacement part. You can fix this with wood glue - But if you want replacement parts you have to go back

drill a nail-sized hole through the side and into the head and foot boards and put a pin through. Later you can put a screw with a wing nut to hold it against little clever fingers. Hope this pertains