Set the Cname in network with sub directory

I installed the plugin DM according to the instructions, but I got a question.
My network is sub directory, but I can not enter the CNAME with kl3.com.br/kl3a (the actual website address to be mapped)

I enter with the following information:

Name: kl3a.eunaovouesquecer.com.br.
Cname: kl3a.kl3.com.br

I put this in the dns zone of eunaovouesquecer.com.br

This is wrong, isn't it?

If so, how should I do?