Once and for all, how do you assembly Marauders?

Since time immemorial, confusion has reigned regarding the proper way to assembly Marauders (and Despoilers). Specifically, the "shelves". The instructions show them facing one way, but every official picture shows them the opposite way.

Has there ever been an official answer to this? How did you assemble yours? I know it's silly, but stuff like that drives me nuts.

https://preview.redd.it/04u30g5uixog1.png?width=900&format=png&auto=webp&s=0ba0cdfc13a7e4ba3d759400d7cb5d28ff6d0ab3

https://preview.redd.it/esyt5k5wixog1.png?width=500&format=png&auto=webp&s=7933f1e77464e272e01b2ef7fd4bcfde500b7c33