You never know What they might be pre-wired for!
I have a 95 2-door, and a 95 4-door. When I installed rock lights, I needed a place to put a switch for them. Wellllll...
I got a standard rear-window defroster switch for a 4-door on ebay, and popped off the "hole plug" in the place where the defroster switch is located in the 4-door, and guess what? There was the connector for the defroster switch, in the 2-door harness! It sure made wiring in my rock lights simple!
SO - I would recommend popping off the middle-right hole plug, and seeing what's back there. The rear window washer/wiper switch goes in that slot. If you can get the factory switch, you'll be ready to go! I have ARB switches in my three right holes - your rear wiper/washer switch would go in the middle hole shown here.
Oh! And you'll need the second washer fluid pump, that installs on the washer fluid reservoir!