My Italian Stallion wintered in a heated commercial garage in New York City.
I did nothing to it, just put it away under a car cover.
To keep the "juices" flowing and the battery happy, about once a month on a "warm'" Winter day (say above 45 degrees), I'd take it out for a drive on a highway for a while. Then put it back for hibernation.
This monthly run served me well...for all its years, the Pagoda was always ready for its Spring roll out.
Regards,
Richard M, NYC