Plug and play. The only risk is if its an x permobil one. Then its possible it may have a different firmware or something. Even then it should still work.
It's a separate part showing on the PDF except indeed it doesn't have a separate part No.
That said, I would look elsewhere at replacing the shocks. I'm sitting in mine now so can't see them but I'd be measuring them up and looking to see if there are better alternatives out there. Scooters, mountain bikes etc.