If I remember right On buckets when you lift the headrest all the way up on the left post on the seat there is a little hole on the top of the plastic thing put a pick tool in there and pry out a little clip and the headrest will come out thats how I took mine out.
I was gonna say,if they dont come out,you could always try yelling at them. things usually come out for me after I yell at them,but sometimes they get sad and break. lol