Facebook Login Integration On Cs-Cart 4.1.2

Hi, i want to integrate a facebook login, into CS-cart 4.1.2. I found information on Web - Facebook Login - Dokumentation - Facebook for Developers , but i dont know were to put this code, to cs-cart to see it. I trie to put that code in [color=#282828][font=arial, verdana, tahoma, sans-serif]design/themes/[SKIN_NAME]/templates/addons/my_changes/hooks/index/[/font][/color][color=#FF0000][font=arial, verdana, tahoma, sans-serif]scripts.post.tpl. [/font][/color] With the hope, cs-cart will see it. I know that cs-cart has a specify addon: Hybrid Auth , that is used for facebook.

Need some help! Thanks!