When I mean embed code, just google ‘badge’ for facebook or twitter then make sure you are logged into your accounts and then decide what style of badge you want then copy that code into the TEXT widget. It will take a little playing around to find the right one you want but both services give you lots of options.
use the social icons shortcode in each page you develop and/or add a sidebar widget (Text) and add the embed code you would get from twitter or facebook.
That is what I did.
Hope that helps.
Best.