steering column restoration

[69Tom]

OK guys, wondering if someone can help me out on this. I'm not getting many answers on the Impala site.

This is a floor shift column for my '69 Biscayne. I have it completely disassembled aside from the column shaft tube and cover. I can't figure out how to get it apart. I'm seeing no rings, bolds, nothing. It's a little different from the rebuild 'how-to' articles I've seen, so I'm stuck.

Any ideas?

Here's some pics of what I'm looking at.