A friend of mine has a Hitachi GMK-29FS3.  Looks to be a fairly common monitor in Neo candy cabs (which is what this is in).  Looks to be switchable medium/standard res, currently set to standard.  Want to confirm the procedure.
Looks like just moving the one connector is all that is implied, but without a manual I wanted to ask those who know more about monitors than I. Unfortunately, most of the labeling is in Japanese (and abbreviations, too), and I don't have a wiring diagram.
Pictures:
15k Connector: 
Small Large25k Connector: 
Small LargeOverall Chassis: 
Small LargeAs a warning, the "Large" images are very large.  "Small" images are ~150kB for legibility.