how to map logo image in header.php?

Hello,

http://www.kingsleysrx.com is my website, currently there is a one image combined with three different logos, i want to map each logo in such a way that when i click on 1st logo i should migrate to specific website and if i click on second logo i should migrate to different website similarly with the third one.

But i am not able to find the particular php code for the logo in header.php, theme used by me is Medicom.

Please guys help me.