Well, yeah it would be as there's already wires there. That's not to say it'd be an easy task, but anything is possible if you have enough patience.
How big is the wire you want to run? Why do you want to run it anyway? as there's the switched power available from behind the Aux plug or indeed from the Aux plug. There's also an additional Aux plug that can be fitted just below & to the right of the air box & the plug (already available on the loom) is permanently live. So there's plenty of power options already avail, why the need to run another feed directly from the battery?