The wiring
I was not particularly prepared for this stage, so I snipped the original FIAT wiring around the mid-point,
removed the bullet connectors from the new unit, and just twisted the cables in a temporary termination - just loosely - as I wasn't sure if the fan would run in the correct direction..
I wrapped in insulation tape , and thought it was good enough for a test

I then mounted the unit back in the engine bay, the physical mounts are unchanged- so goes back in exactly as removed.