Nor should you connect it direct anywhere. Get a quick disconnect from an electronic shop nearby. Hook the positive and negative into one side of the disconnect and the bike 'switched' hot and neutral into the other side. Nobody wants to undo screwed down electrical connections during routine maintenance.
An SAE connector would be a good option here.
I put one SAE connector between my bike and my side panels. When I pop thrm off, easy to bust it loose. It powers my dual heat-trollers, my side marker lights, and my accessory outlet plug on the side panel.
Think ahead...
T_C is correct here. When I viewed and replied to your post my device did not show your picture of the 12v outlet with attached wires.
As T_C posted I would connect the wires in a way that allow easy disconnection for when you remove the fairing for maintenance. My 12V power point does not have wires coming out of it rather it has male terminals on the back of it.
http://www.marinco.com/en/12vrc
I installed the Marinco 12v power outlet in the RH fairing pocket. The positive and negative connections are wired into the bike's 12v system to unswitched power (I prefer unswitched so the connector can be used for my battery tender/charger when in the garage and for charging my phone and Sena headset on the road without having to have the ignition key ON or ACC.) When I remove the RH middle cowl for maintenance I just unplug the female wire connections and remove the fairing.
The ground points on the frame I mentioned are still there and handy for the purpose of adding some accessory item without having to run a long negative wire to a common ground.