Jorge, I'm not a tech or audio guy. The wiring diagram for your audio system are in this thread; just scroll down to find the SESG2:
http://www.cvoharley.com/smf/index.php?topic=53364.0The wiring diagrams will identify the + and - wires for each fairing speaker. How you deal with the connectors on the speaker wires is up to you. You can cut them off and attach insulated spade terminals, or use jumper wires tapped into the speaker wires (preserving the OEM connectors by using Posi-Taps, 3M crimp taps, etc.) with insulated spade terminals attached to the jumper wires for connecting to the speakers, to name a couple of alternatives.
Like I mentioned, I'm not a tech or audio guy. You will be replacing the 1 ohm impedance fairing speakers with J&M's which are 2 ohm impedance. This higher impedance will lower slightly (?) the volume you hear compared to the OEM 1 ohm speakers. Whether it will be an issue for you, I don't know since I have no personal experience with this modification, and the reduction in sound is an electrical consequence of replacing a speaker with one of slightly higher impedance.
I waited to reply to your post hoping someone with far more knowledge/experience would offer you a better and more complete answer. Hopefully, someone will.
Carl