CST Microwave： charge distribution

I'm using CST microwave studio for modeling qubit in 3D cavity. I've found eigenmode of the cavity, now I add a model of qubit which is two planes (acts as capacitor) with inductance in between on a silicon chip. Now I should find dipole moment of this capacitor in order to calculate coupling of the qubit to the field in the cavity.
The problem is that I can't find charge distribution among the results of the solver. I had an idea to numerically integrate currents over time in each sell to calculate charge. However, changing the phase does not change the file with current distribution in planes.
Does anybody have any ideas how to calculate dipole moment?
I'm using eigenmode solver.

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