Instead of holes or cubes for each battery, there is a width of the battery holder and a long cutout centered on the width. The cutout size is choosen by the maximum number of batteries of the selected type which fit into the cutout (battery diameter + a small offset) Each holder holds one type of battery in at least one line. The battery holders may have two holes on one side and two connectors on the other side to connect the different holders. The position of the box is important for the connectors to be appied.

standalone: no connectors are applied
top: only the connectors are appied at the bottom of the box
center: holes are appied at the top and connectors are applied at the bottom of the box
bottom: wholes are applied at the top of the box

A single row looks like this: