Hello & welcome to the forum.
Just like the last guy, we need to know what your Wheel Device is. We can’t assume that everyone has the same. We need the Brand Name, and Model of your device. Such as mine is a Logitech G25. Please help us to help you. I can’t count how many times you guys leave this important info out

You won’t find double trailers in this game. Hooking up a trailer is the downside of this game. It’s just not in the cards. Your last question depends on the first one.