Steering Column question???

Stephen Mulkey said
Do you have the service manual for the car the column came from? If you google My Mopar you can download one for it i believe.

I do but I found an article online that mentioned these square nuts. I must have lost them without knowing it when I disassembled the column a while ago. Luckily I have a second already disassembled column that had them. I just didn’t know what they were for!!
I still don’t quite get how they bring the two housings together but they do.