How to make the labels transparent in SciDraw` package

Hello!

I am drawing the level scheme for which I am using Needs[“SciDraw`”];
I am trying to make the TailLabel transparent. I tried TextOpacity → 0.5 but it is not what I want.

Can you tell me how can I make the TailLable transparent.

Thank you!

My_script.nb (28 KB)