advice getting column together

I checked the pics of the columns but they don't really show a floor shift for the 67. The problem I am having is trying to get the signal housing back onto the column itself. I have rotated it 590*,tried tapping with a rubber mallet but so far no luck. I did find the 2 square nuts they had fallen into some old grease. They don't appear to tighten anything looks like they just go behind the signal housing. Any advice or a direction is greatly appreciated.Thanks all.