How do I get the turn signal cancelar plastic piece out of steering column

Here’s a link to a download of the 72 FSM, admittedly not 73 but might help.
http://www.mymopar.com/downloads/servicemanuals/1972_Plymouth_Chassis_Service_Manual.zip
Yes, thank you. I have the book at home and I also checked out this link. Looks like gotta go into the bowels of the coloumn. The picture diagram doesn't explain what that little metal piece is that I have circled in my pics but I think they reference it to a clip. I don't know how to get it out. I tried prying it up with a screw driver and that don't work.