Trucky doesn't check if the imported truck or trailer is compatibile with your game configuration. This will spawn this trailer attached to your truck, make sure there is sufficient free room.
To import trailers configuration into another profile, share it, copy the Unique ID, change profile and select the save where you want to import the new trailer.
To import trucks configuration into another profile, share it, copy the Unique ID, change profile and select the save where you want to import the new truck.