that is for a hydro unit, look back at the description and read the detailed notes.
instead of using a speed sensor and TPS, you're using a vacuum switch and a oil pressure switch to engage the LU solenoid.
obviously, you won't use that whole set up but you can accomplish it with some of those parts and a small switch. somebody on here also used a NOS solenoid to do the same with a 42 or 46 RH, same idea.