Tandem Agri-Fab discs?

Last fall on Ebay I bought a discount open box Agri-Fab disc. It arrived and I checked and no parts were missing. Today getting dirt for mom at Menards their Yardworks disc which I’m guessing is actually an Agri-Fab was on sale for $199 and I bought it. I was planning on doubling them up and putting one of my extra garden cart hitches on it then one of my multiple lawn tractor front axles with wheels and tires on it then building a lift mechanism. Does anyone have any suggestions for mounting them together tandem?