I have my main leisure electrics under both front seats, but run a big power cable to a fuse box near the base of the c pillar where my fridge lives, and the lighting circuit is powered off this.
So power from under the passenger seat, up the b pillar, above the sliding door, down the c pillar to fuse box. Then back up the c pillar, over the door and down to the switch, then up to the lights which are grommeted just above the passenger grab handle in the pop top frame.
If you have power under the front passenger seat you can skip the backwards and forwardsing - it is just where a lot of my stuff connects in.