Make a New Client as CUA

after installing the default installation I got these clients 000, 001, 066

I made additional 3 clients 100,200,300

First I tried to make a new administrator, I couldn't cuz I didn't find any template roles to assign them to a new user I have created already.

after making the new Administrator I ll start to make my landscape as follow, (just for studying)

client 100 CUA

Client 200 Child client

Client 300 Child Client

So all of them are new as you see, what shall i do to finalize this issue?

many thanks