68 Barracuda steering column reassembly

So I just put mine together and the bottom collar rotates between the slots it fits in. 2nd pic. Everything else is tight and looks good. What holds the bottom collar tight? On a column shift car it’s the key and shift tube lock screw. I do believe the square head bolts grab the square slots on the column jacket. 4th pic. khuebner250 yours came out amazing need your help lol.

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