I bought these modular vehicles from Old Crow some time ago.
... and finally got around to assembling them ...
Each section is preassembled and has a pair of magnets in it to locate them together. They are going to be utility trucks that house all the necessary equipment to deploy the fliers and three of them will tow the mobile landing pads. The forth is going to tow a generator.
Wheels have been left off for now to aid painting.