They all add to the steering. Usually a suitable column and motor plus electronics from another vehicle. The existing columns are cut and the donor parts welded in. What is it that you are looking at?
If you google facebook and the name of a group such as fiat or cabanon you may find you get a facebook page which you can read but not post in. The question may have been asked.
Someone on here recently said they run a / the Renault Trafic FB (I think it was, rather than WhatsApp etc). Hopefully it wasn’t in an ancient thread that has been dug up.