files.log need to add id [orig_h,p and resp_h,p]

I need to add id [orig_h,orig_p, resp_h, resp_p] in files.log , so i tried to
add the content into opt/bro/share/bro/base/frameworks/files/main.bro but its not accepting.

I added below code into main.bro

id: conn_id &log;


function set_info(f: fa_file)
if ( ! f?$info )
local tmp: Info = Info($ts=f$last_active,$fuid=f$id,$id=f$conns);

f$info = tmp;
print “test”,f$conns;

any other way to do this , ??