JUST the SIDE CLIP or sometimes officially known as a contact switch.... often lost or broken on TILT columns.
If looking for a Contact Swtich for the NON TILT colunm.. use PW17985M
This is on the side of the ignition lock inside the boss area and helps activate the lgnition lock buzzer....which is there to remind you to take the keys out.. but is also a proper PITA to get to.
Different years use different buzzer boxes but this clip is pretty much for 69-about 81 GM US.