How to insert code to login and register page?

Store Builder Questions
1

i need to insert some

code to login and register page,but i don`t know which file is for this ,could you please help?



specificly ,i plan to add janrain social login code to login and register page, the code is in 2 parts ,first part need to be put in of the site,i put it in skins/myskin/customer/index.tpl ,the other part is “[color=#8F1D85][font=Monaco, monospace][size=3]
[/size][/font][/color]”,need to be put where you want the embedded widget to be displayed on your page.



thank you.

2

or if i only need to add the “social login” link to the register page,how do i do ? i don`t know which file is used for register page .thank you