How to access / configure Simscape parameters from Multiple Simulations configuration?

I am looking at the Fuel Cell / EV reference application (as an example) and multiple simulations.

The model includes Simscape blocks. Can I configure/access parameters of those Simscape blocks from the Multiple Simulations dialog? (I can successfully configure Simulink parameters (for example, vehicle mass) within the Multiple Simulations dialog.)

As an example, in the model, under FCElectricPlant, there is a DC-DC Converter Simscape model. There is an "efficiency" setting under "Losses" that I would like to change using a Multiple Simulations setting.

Thanks!