After I install cpanel. I want to config my site for use ssl for 443 : 
https://www.xxxxxx.comWhen I login cpanel and add ssl in cpanel. 
/etc/pki/tls/certs/xxxxxx.com.csr
/etc/pki/tls/certs/xxxxxx.com.cert
/etc/pki/tls/certs/xxxxxx.com.key
These file auto create after I do function add ssl
So what step I have to do for mysite work like 
https://www.xxxxxx.com. I aslo find on google how to config. But when I do Apache not restart. Now I thing best way to ask in forum how to do is better. I hope someone help me about this problem   
