So I received the unbranded versions of the Caltrain content in TSW6 and went to check what has changed besides branding removal. I found that for whatever reason the gallery cars MU cables now correctly seem to connect to non-CT stock plus the gangways work again but a new issue has been created, the HEP cables don't connect to anything, not even other gallery cars as seen in the screenshot. Oddly though, HEP/lights can still be turned on from the cab of the cab car even when no loco is even attached which I think is 100% a bug.