Hey don't feel bad, this is all new to you. Look in the 1968 FSM, page 9-10. It is an exploded view of the column. I have two standard column shafts. The lower groove is for the bowl centering spring retaining clip. The upper groove is for the thrust and wave washers retaining clip. Above that go the cancelling cam and spring. But since the column is out of the car it would be a good time to remove the steering shaft and check the lower bearing. It is held in by that spring clip at the bottom of the column. But be careful, the ball bearings can fall out easily. There is a spring between the flange and the bearing adapter. It keeps the bearing pre-loaded. Don't force anything as that bearing is totally unobtainable! Remove the bearing adapter, remove the bearing, and clean it. Catch any balls that fall out! Grease the bearing cups and balls so they stay put. If balls fell out to get them back in you need to tilt the bearing cups apart and at one point it will be open just enough to get them back in. Apply grease first so they stay in place. My bearing was missing quite a few balls and I replaced them from a parts column. I'm sure replacements are available like from bicycle bearings just mike them to get the size.