Modeling Heat Conduction Between Three Blocks in Simscape

Hi Everyone,

I have a question regarding modeling conductive heat transfer between three bodies as shown below. The blocks A and B are identical but with different heat generation rates and in direct contact with block C. Which is the best way to model the conductive heat transfere between A,B on one side and C of the other? I think both aproches are valid, but is there a more accurate representation?

Thnaks and Regards

MH