I've always installed tools to my Okuma by putting them in the spindle first and loading them to the ATC magazine from there. I want to be familiar with loading them directly into the magazine as well.
My instruction manual says this: Load the tools specified on the program process sheet into the corresponding tool pots - make a memo of the correspondence between the tool number and the tool pot number. Push the tool into the tool pot second to the left of the tool pot at the magazine indexing position (bottom end), while pulling the pot unclamp lever. The tool will be held in the tool pot by spring action.
As far as I can see, there is no such lever. My best guess is to just push the tool into the pot (any pot). And to remove, just use a small pry bar. Am I wrong?