The dealer should have also given you the original front cross member bracket that is changed out to the cross member to accept the front of the backhoe subframe. It is painted blue. I would hang on to both of those parts.
/ What’s this part for? Came zip tied to BH bucket
A little advise when hooking up the backhoe. Before backing up to engage the subframe remove the pin holding the drawbar because the pin hanging down will not let the subframe enter the slot. Remember to put it back or just remove pin and drawbar all together when using the hoe.