API support for "Empirical two ray model" model parameters

I'm using the API to compute wave propagation prediction, more specifically I use the OutdoorPlugIn_ComputePoints() function, the scenario is RURAL, and the propagation model I want to use is "Empirical tw ray model" (WinProp_ParaMain::PredictionModelRural = PREDMODEL_RURAL_2RAY_EMP)

My problem is, I don't find where I can pass the model paramteres through the API. With most other propagation models I found the API support for model paramteres, either with dedicated models structures , or through the WinProp_ParaRural struct. 

According to the Proman UI,  the "empirical two ray model" propagation model receives the following 6 paramteres: 

Where can I pass these parameters using OutdoorPlugIn_ComputePoints() ? 
Thank you very much!