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You want to click on the "Simulation Settings" tab on the left side of the OpenStudio window (looks like a gear). Them click on "Heat Balance Algorithm" to set the following inputs:

• Surface temperature upper limit
• Max surface convection heat transfer coefficient value
• Min surface convection heat transfer coefficient value
• Desired algorithm
  • Conduction Transfer Function
  • Moisture Penetration Depth Conduction Transfer Function
  • Conduction Finite Difference
  • Combined Heat And Moisture Finite Element

Note that from the documentation for the Heat Balance Algorithm object in EnergyPlus, there are other Material Property objects that should be part of the model specifically when trying to use the HAMT-model. It doesn't appear that OpenStudio has this capability in the GUI. The Building Component Library doesn't have an existing Measure to add these objects to a model, so you would need to create a measure. The alternative is to add the Material Property objects by hand to the IDF file generated by OpenStudio.

Selecting heat balance algorithm in OpenStudio