Add new N3048 to current switch stack setting

I have a question about the N3048 switch stack.
I have seen many questions to solve my questions. But I do not have any questions to solve my problem. I need your help.

There are switches that other administrators have configured. I am now using two N3048 switches. The two switches are currently connected to the stack.

Here I try to configure the stack by adding a new N3048 switch.
I want to know how to connect the stack cable.

Is the picture below correct?
And do you have to set up CLI settings separately?

very urgent.. Please help me.