I suspected it wouldn't be possible to do something like this, but I wanted to ask, so I'll leave the question open for someone who might know.
I have other questions related to vehicles and AI movement, so I'll ask them here to avoid creating another thread.
1. When importing a vehicle model from another game, what exactly is needed (besides the vehicle model, of course) to add a new vehicle to AI movement

Is there a way to see in Blender the scale of a given vehicle being imported/exported, and what scale is needed for ETS 2 so that the vehicle isn't too small or too large
Looking at vehicles made by SCS or other creators, I saw that the model is made of several pieces, and I know I'll probably need to add many locators for lights, drivers, etc.
2. Does a vehicle in AI movement have to be made of several pieces, or can it be, for example, a single piece for the body of the car and separate wheels for the vehicle
I'm asking because I want to add a new vehicle to the AI movement and I'm importing it from another game where the vehicle is just made, that the piece called body is the entire body of the vehicle, only the wheels are separate and the scale of the vehicle is probably smaller than in Ets 2 because I'm importing the vehicle from a game where these are remote-controlled cars.