pretty sure it's not factory in this case.
the molex connector wiring doesn't match anything on the schematic and the connector pins being used isn't how bally did it. They used the pins in numerical position order with an occasional missing pin on variations of the same machine base model number, but they didn't use something like pins 1,2,3,10,11,12 like the picture looks.
the 1000uF capacitor is a lot larger than bally typically used. The usual values were 30 or 50uF caps ... 1000uF would take longer to discharge and unpower the associated relay.
the cap is also rated for 50V (I think), which is too low for good design practices unless it's in the 6V lamp circuit. Bally normally used 150V or higher rated caps.
they did use larger caps like 400uF in tilt relay circuits - but mostly in stands for european games.