I have a 79 Cutlass and am swapping an aftermarket steering wheel back to the origanal. I have everything from the locking plate cover down. I also have the nut, retainer and horn spring/wire. It seems like I am missing a piece or two that goes into the center of the steering wheel after the steering wheel is put on. Can you please look at the enclosed pictures and see if you can help me identify the parts I need. Thank you.