I decided to add some lights to the transporter.
I had to drill loads of holes to pass the wiring through, I also found the limitations of using pre-fused LEDs which was a bit annoying as I had to created several separate parallel circuits.
The lights are mostly on the outside as running wires into the interior was a bit too much to deal with on a first attempt as using LEDs.
They do all work, I just needed to make the battery compartment removable. I also need to hope that none of the wiring or LEDs fail in the future as it will not be possible to access them again without removing the deck and that is not going to happen.