Since the tractor supports 3 trailers, can you connect more to the large rover since it is much bigger?
You are only able to connect one trailer to the large rover. The thing with this is that you shouldn’t be using trailers with the large rover. A rover is just a platform. You add a cockpit to drive it. If you do not do this, it will become a giant trailer that gives you way more storage than you would get with three regular trailers on the tractor.