I've swapped hatch doors before. You have to pull back the headliner in the rear and you can unplug everything. I don't remember about the washer spray thing, but I think you can get that off nicely too.
I don't know if the wiring is set up for a 3rd brake light, I don't think the harness has the necessary plugs for it.
I don't know if the wiring is set up for a 3rd brake light, I don't think the harness has the necessary plugs for it.