How interlocking modules could support a modern auxiliary ship

Could a modern auxiliary use interlocking container-type modules for engineering, supply, and helicopter spaces?

Potentially yes; a deliberately modular construction system could assemble those functions with relative ease.

A Max-style auxiliary assembled from interlocking modules is plausible when structural interfaces are designed into the ship from the beginning. Container-like sections could provide engineering plant, supplies, workshops, or helicopter-support space. Power, access, cooling, and damage-control connections would have to align each time the modules were combined. The value lies in rearranging support functions without pretending that every combat system can be swapped without integration work.