Just FYI... The supercharger with out the upper intake assembly complete with injectors, midplate, intercooler core..etc is not worth much for someone looking to do a lightning conversion. You rarely see these other items sold by themselves and to purchased them individually would be cost prohibitive. Make sure you purchase complete upper supercharger assembly off of lightning or harley.
I have added photos of what you should be looking for....
Wiring harness is not necessary as you can use your stock expy wiring harness with few mods.