[users@httpd] EC Parameters

[Jason -]

Suppose that I have an EC curve name - let's say secp521r1. How do I insert it 
into my first certificate file so that Apache can accept it? This functionality 
is shortly described here ( http://httpd.apache.org/docs/2.4/mod/mod_ssl.html 
in SSLCertificateFile Directive) but I cannot understand what to write below my 
certificate file so as to declare secp521r1 as the default EC curve name. How 
can I do this?