Using pliers to screw a screw eye into plastic (can get online or twist em out of other charms) If the plastic is too hard u can use a match to heat the screw up (be very careful though..) if u need a hole u can take a big metal threading needle and heat it over the match flame to be able to melt plastic (this takes some practice and dont do it over carpet)
What it looks like screwed in! Thanks for the ask :3