Block Widget Lost…?

Please help – I am a complete programming ignoramus; all I know is my company website used to have these little social media buttons in the header (like it does here? https://web.archive.org/web/20140103103357/https://swartzelectric.biz/ ), but now it does not (https://swartzelectric.biz).

I used my developer tools/view source browser tools and can see that I am missing a big chunk of code that was line 327 on the archived website but I can’t find anywhere in the new one. This is something referred to as a ‘block widget social profiles’ on the old page…?

I have no idea how it disappeared or how to reinsert the code back in – can anyone please help me?