For a non-AI answer, there's no explicit reference. When the ride opened, it did have the "JBS.wrks" sign painted on the building. It was purposefully made to look faded, fitting in with the abandoned warehouse motif of the station and the general Saw storyline. Image from 2009. Back then, there was much less emphasis on Easter Eggs, hidden meanings, etc. It was likely thrown on there just to add an extra layer of 'this is an abandoned warehouse' and 'JBS.wrks' sounds like a plausible thing for a warehouse. The addition of the new signage is a bit unnecessary and doesn't add anything meaningful or worthwhile in my opinion. But equally, for some signs that were probably a couple of hundred quid, it adds another layer for repeat visitors to make things feel fresh. You could even argue that the "JBS.wrks Est 2009" signage goes against the original planned story, as the whole point is that the warehouse was abandoned and taken over by Jigsaw in 2009. But it's not that deep and doesn't matter. So yeah, no real relevance. Almost certainly doesn't actually mean anything. And very much done for the sake of it.