5G-NR SSB Frequency Location Information

Hello Experts.
I’m having confusion on reference point A in 5G NR SA. is it mip location?
How do we choose that reference point A according to what?
What is the implicitly meaning of it?
I just to understand the idea of it because in lte we dont have A reference point.

I’m asking about reference point A because all offsets like CORESET offset and other offsets are referenced to that point.

I made a post about this a while back on Linkedin, do check it out. It gives a visual representation for easier understanding.

Let me know if you have any questions: