@1UZ-FE mentioned creating an object which could link two hitches together. I thought it was a good idea, so initially I went with the most basic route since it was also the fastest: I created a female hitch which could be installed on a pickup or roamer. That allowed a pickup to couple directly with another pickup & etc. After grabbing that low-hanging fruit I hacked up a vehicle which can couple two other vehicles... the Giant Chain. v04 - bugfix (removed extra json file) v03 of the mod adds a new vehicle of the "trailer" type: the "Giant Chain". It's just like the Giant Flail, only the spike ball has been replaced with an extra coupler! Therefore this chain may be used to join any two vehicles which have trailer hitches. v02 of the mod adds two types of hitch for the pickup/roamer: "female" and "short chain - female". Both can accept a hitch, eg they act like a trailer, not a normal hitch. Install the female version on one vehicle and then switch to another vehicle which has a normal hitch - you'll be able to couple with the female-hitch-equipped vehicle! Using the giant chain along with two other vehicles will spawn a total of 3 physics threads and therefore users on dual-core laptops or older computers will suffer. Those users may prefer to use the special hitches instead.