I am a little confused about the equivalent inductive network provide by LCGen. How is the configuration decided?
LCGen determines which nodes (which serve as circuit terminals) are conductively connected and generates a tree structure for each contiguous set of nodes; these tree-structures are coupled through appropriate mutual inductances. The topology for each tree is not unique, but this does not matter because subsequent circuit analysis will provide the same answer, independent of chosen topology. The code will automatically assign a node that can serve as ground for each tree.