Team Abbreviations (
Link to official league schedule, shows abbreviations for both teams)
North Shore = NS
West Oahu = WO
Division Names
The divisions are called Hawaii Winter Baseball East and Hawaii Winter Baseball West (Not just east and west division) respectively.
Here is the link to League stats which shows the official name usage, and it also showed the name in the schedule link posted above. You could also shorten it to HWB East and HWB West as they have done in some places.