Quoted from wiredoug:that diagram is the input voltage switch. your B-3235 is 115V only so it wont have one.
keep in mind its perfectly likely this isnt the original transformer
It could be the original transformer but not the original schematic...
Games that can be converted have a jones plug like assy near the transformer where by moving the plugs the coils are in parallel (115v) or in series (230v). I had a Far out that had such arrangement but an Auzzie had a transformer die on him, he needed this 230v option so I swapped out the transformer for a standard North America one and sent the 230v one off to resurrect the game. (yea Im usually a nice guy).