You have removed the 4 nuts indicated by the red arrow. These are removed when the column is out of the car to service the sector shaft. Replace them. As Tom states, you will have to readjust the column now using the shop manual instructions once you have the column out of the car.
The pitman arm attaches to the sector shaft indicated by the pink arrow. Remove the pitman arm.
The TWO bolts that hold the column to the frame are indicated by the yellow arrow. Remove these two bolts.