There was a Lahoods arcade on Beamish St Campsie and they had 2 HBs. This arcade was very interesting in that it had bingo machines, a couple of woodrails, some EMs and all the latest SSs back in late70s, early 80s. I did not mind HB as a novelty but the games for me went very quick and I always went back to the pinball machines.
Nice find and good to see you restoring one as it definitely has a place in the history of arcade games.