setting social media links

hi, I”d link to add the actual links to my social media pages – I can see where you add these to the top menu icons but I don’t want those to show. I only want the links on the posts pages to show. I have them in place but cannot work out where to actual set the path/link..

I have also installed the Simple Share Buttons plug in – but again I cannot see where you set the actual links.

the site is at http://premiumproseindia.com/testsite/wp/are-the-stories-suitable-for-all-ages/

many thanks
sarah