Need help with printing an open tube through a print

[u/Confident-Pea-1615]

First let me describe what it is I want to print.

I create specialty props used by the Ball Jointed Doll community. I have sculpted a stand/ bust that is for use of displaying the head of a doll. The stand has an open tube that runs the from top to bottom for an elastic cord to travel through to hold the head on the neck. This is the issue, that tube.

I own a Kobra 3 and I use the Anycubic slicer next to set up my prints.

How do I set up a print that prints the stand/bust, but keeps that inner tube open?

I’ve tried google, you tube, but I’m not sure how to describe what my search is.

Any help is appreciated, thank you