Before anyone starts with the namecalling and laughing at my questions - I admit to being mechanically challenged

Anyway - could someone tell me where the cat is located? Exhaust is coming out both my pipes, so can't be there..? If I buy 2-1 cans, will I need something else to get rid of the cat?

And also, being a single cylinder, how come two pipes are coming out of it?

Lastly, I was thinking to get a Power Commander in due time, and see that it should be used together with an O2 eliminator. Is this the plug-thing on one of the pipes under the front of the bike?