How to get Software Center or System Center 2012 Application Catalog website?

Hi, 

am using SCCM 2012 R2 to to side load windows apps.

I took the appx package and i added in the application and i deployed the app.

I cant not find Software Center in my PC.

They mentioned like if i open the Software center there i can able to see my app listed in that or

if i go to System Center 2012 Application Catalog website. there i can be able to see the app listed.

How do i get  Software center or How to go to System Center 2012 Application Catalog website?

Any help on this please?

I followed the below article to deploy the app.

http://blogs.technet.com/b/keithmayer/archive/2013/02/25/step-by-step-deploying-windows-8-apps-with-system-center-2012-service-pack-1.aspx

Anybody please help me on this?

Thanks in advance