Short question: On a Qjet with and electric choke, how do I adjust the choke to the proper orentation?

I am aware that the choke housing is held tight with 3 screws. If you loosen these 3 screws, the housing can be rotated. What I would like to know is: how do I know what position to se it at? Do I do this at part, none, or full throttle?

I'm guessing that Denny knows.

Thanks in advance.