Yashica Mat Taking Lens Dissasembly

Hello, I have a proper lens spanner and have removed the rear taking lens from my Yashica Mat 124, my problem is that it has two elements from what I can see, and there is a fungus spot on the inside of the rear element of the rear taking lens that needs cleaning.
I cannot figure out how to separate the rear element from the front element of the rear taking lens.

Does anyone have any idea how that is accomplished?

Thanks

Looks like a Tessar which would mean the two rearmost elements are cemented. You would have to uncement them and recement them, you can search how to do this, but I've heard it's quite difficult to do with good results.