word usage - Is the wall of a box closest to the player called the **head wall**

This post gives a tutorial on folding a paper box, which uses a term head wall in step3 of part2.

Construct the head wall, when the side walls are assembled.

Is the wall of a box closest to the player called the head wall.

This post gives this description about headwalls.

Headwalls are an important part of most SUDS drainage schemes, preventing erosion at the point of discharge into watercourses such as attenuation ponds, detention basins, rivers, ditches and swales.

which does not seem the same thing in the origami tutorial.