What's missing on my steering wheel
See the piece in the bottom right? That gets fastened to the far side of the steering wheel before putting it on the column. It fills the gap between the column and the trim. The part in the lower left screw to the horn switch (not shown) like your's is now, and the assembly fastens to the near side of the wheel. The padded center gives a 1/3 of a turn to that.
You didn't say what year car you have. The pieces shown are for a 70 up B/C-Body with the ignition switch on the column. For an earlier car without the switch on the column, the lower left piece is slightly different, but the later will fit the earlier, although it leaves a gap that most people won't notice. IIRC, the piece on the lower right isn't used. Earlier won't fit the later and I'm not sure what pieces will fit an A-Body "correctly", but the wheel should bolt up with the later style stuff.
EDIT: After looking at your pics, you have the "earlier" style hub.
See the piece in the bottom right? That gets fastened to the far side of the steering wheel before putting it on the column. It fills the gap between the column and the trim. The part in the lower left screw to the horn switch (not shown) like your's is now, and the assembly fastens to the near side of the wheel. The padded center gives a 1/3 of a turn to that.
You didn't say what year car you have. The pieces shown are for a 70 up B/C-Body with the ignition switch on the column. For an earlier car without the switch on the column, the lower left piece is slightly different, but the later will fit the earlier, although it leaves a gap that most people won't notice. IIRC, the piece on the lower right isn't used. Earlier won't fit the later and I'm not sure what pieces will fit an A-Body "correctly", but the wheel should bolt up with the later style stuff.
EDIT: After looking at your pics, you have the "earlier" style hub.