wm9500hka l-g-mds64974801 reinstal rubber boot

need to reinstall rubber boot. it's really hard trying to get the little flap over the thin edge of rim. able to get at 12 oclock pos. pushed in place around but siips off at start pos and further down slips off period. top of off, but on this model i can't videos etc to deal with this model. all other videos are built closer in models to see what to take apart. tips of knowledge working with front or tips to take front off, which i believe maybe easier to get boot back on. wm9500hka   l-g-mds64974801