Here's a link i found that tells you how to set up CCA
https://community.dynamics.com/crm/b/crminogic/archive/2014/03/19/how-to-set-up-cca-for-crm-2013.aspx
and this is the link to download the needed file.
http://www.microsoft.com/en-us/download/details.aspx?id=40321
According to the first article you'll need to download the MicrosoftDynamicsCRM2013UII.exe
file.