Improving coupling of a resonator by looking at surface currents

[yefj]

Hello , In the system below there is a mode i am trying to couple.
at weak coupling I get a certain surface current responce and in stronger coupling I have different responce as shown below.
How can I see from the surface currents where can i improve the coupling in my model?

 

[osilmag]

Are you possibly wanting to know the Q-factor?

https://www.electronics-notes.com/a.../q-quality-factor/basics-tutorial-formula.php