Ssl certificate

hello,If I do not know about this place for the question and sorry if I was wrong
i renewed my ssl Certificates in goddady today,download it after choose (other).
I got two files from goddady one file name is my domain and second file call gd_bundle, I got my domain in directadmin then SSL Certificates!
now there is the old Certificates .. which code from which file should i replace old code?
thank you