COMSOL: How to relate terminals in electrical current?

[M_K]

TL;DR

Simulation of the capacity between winding wire of a coil using 2D geometry.

hello, i have a problem in comsol multiphysics, i want to relate many terminals to each other to buid a current circuit in 2D geometry.
I was thinking to simulate the capacity between winding wire of a coil. So, I have to choose boundary conditions in the winding wire which are Terminals and grounds. For the terminals, I can't put the same potential in all wire because it is a serial circuit (coil) So, I have to relate terminals to each other.

 

[Baluncore]

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