I think it was their own special way of saying “Go Habs!”
I bought Two Virgins when I was in England in 1968, near the time of its release (which was only a few weeks before the release of the Beatles’ beautiful White Album), and before it was sold in America in a brown paper sleeve to cover up the body parts.
It’s a terrible album, consisting of John and Yoko shrieking and sending out other stupid noises that would make cats in heat sound like the Vienna Boys Choir.
At one point I sold it, which I’ve always regretted, probably because it was one of the few souvenirs I had of my trip to England.