This is for anyone who hasn't figured this out but this is what worked for me.
1. Place barn and manure pit
2. "Place Manure Transfer Trigger" in manure alley way of barn or barns, along with placing a trigger by manure pit. I put mine on left side of the ramp on ground.
I had advanced my in game time to see if it worked and it does. So I hope this helps someone out new to this mod, because this is a terrific mod that adds more realism to the game.