How do I reconnect the deck to the tractor? My wife took it off and I'm trying to put it back.

Hi,
I will put up a couple of pictures, but the link I give will be a better choice. It is Deere's manual site; type in model, hit search, pick the base unit, pick the operator manual, scrolldown on left menu to Install Deck and there you have pictures and directions.
John Deere Ag - New Equipment: Technical Publications - Equipment Search
Peace,
Clarke