How does the mower deck connect to lifter on a stx 38 mower

Hi,
I am confused. I think I have posted both the yellow and black decks and the belt routing previously. The rear hangers come to and angled point at the back and are attached by sliding the hanger on each side between a piece of the lift that has an elongated "U" bracket fastened inside it. This is done with the lift set all the way down. Then the other ends of those arms are fastened to the middle of the frame.Attachment 46218
Peace,
Clarke