On the US versions the main wiring loom runs from the interior to the boot on the left side, there are additional spots in the rubber seal for additional wires. The battery cable runs through a rubber seal on right side. Not sure if the cable runs are reversed on right hand drive models? The pass throughs are under the carpet in the roof storage area close to the rear shock mounts. I would not run a antenna cable or electronic wires near the battery cable due to interference.