The manual is totally useless. The C parts you don’t know how to set them up. They have a cut at the end that doesn’t allow them to lay straight on the floor.  So you don’t know if they have to go pointing outside, inside or one inside and the other outside.
Also, the second picture shows the wood is cracked making it less resistant and prone to break down. 
After one and a half hours of assembly at the end I discovered that. I need a replacement asap