Send TIF2 a PM; he's working on overcoming the wiring issue HD created by not making the fairing/interconnect harness on the SESG2 compatible with the non-Ultra overlay harness (NUOH) other bikes would use for adding CB. Bascially, you need to add the 6B connector to provide power and ground to the NUOH for the CB module.
Also, consider the Boom Audio Music & Intercom kit, p/n 77108-09A, which will include the left side handlebar controls (including the PTT/squelch switch) and harness; rider and passenger headset connections, and passenger PTT/vol. controls. The kit will allow you to retain the unique SESG2 tank console. Here's the thread from my installation; since your bike is a '11, the mods I made for installation on my '04 won't apply, but you'll get the gist of the installation:
http://www.cvoharley.com/smf/index.php?topic=42830.0HD parts will be about $900 plus antenna and headset(s).
Carl