Teabags,
I don't think this can be done by a simple parameter.
The direction parameter for holes does not seem to be exposed.
Also why would you want to change the hole direction?
Hole direction change would only be needed if the hole were in another body where the reference face was a surface or plane.
I am assumed this is the correct scenario.
And later you are using the hole in some boolean operation on another solid.
Regards
Neville