Use brim.

Tolerances may be off, since 3d printers don't have the same tolerance.

If it does not fit, it has to be a tight fit, adjust your settings.

Use aluminum foil, and curl it up into a cylinder into the hole and attach a battery, the battery will hold it in place

I recommend inserting a long wire, inside the hole, and twisting it so it does not get loose

You should also coil the aluminum foil 2-6 times.