The walls are neither closed off laterally nor crisscrossed. They are secured only with a lanyard, which POSES A LIFE-THREATENING RISK.
The purpose of the gate is solely to secure the individual elements. It is NOT intended for securing them during transport.

Below are examples of cross-ventilated walls;

If the wall is braced diagonally, the chains pull in opposite directions, preventing the walls from moving sideways.
Below is an example of a lock using a locking pin;
