how to add a switch to an existing fabric

Hello,

I have only done this task one time before so I am a little rusty. I need to add a switch into an existing fabric, actually one in each fabric A and B. I will configure the switches, then assign it a domain id greater than the core switch.

I don't remember what to do after that, and I can't seem to find the answer in the DCNM manual. Any feedback is greatly appreciated.