If possible remove insole and slide crease protector all the way to front of the show, then reinsert the insole.  If insole is glued, place in toe box on top of insole.  The cutout side is for outside of shoe and the sneax logo should be on the arch of your foot.  If the fit isn't perfect please use scissors to trim until feel is right!  Once properly installed you should not feel the crease protector.