Taxidermy, when mounting a duck how do you attach an artificial duck head to

[Ragin Cajun]

the manikin? I'm attempting to mount my first duck but the instruction booklet explains how to attach the natural head to the manikin, but i didnt want the beak to shrink so im trying to attach the artificial head. With no holes in the head im not sure how to attach it. any help would be greatly appreciated.