How to column-shift to floor-shift

Ok I was looking at your collars verses mine and my bottom piece has to be able to turn but your says
"The lower third section of the column housing slides over the end of the shift tube and is secured with a 1/8” allen head set screw." Mine doesn't have a hole or set screw are my collars older or something. Could I drill a small hole put in a set screw? I don't know.