Just returned home from Disney...I saw many kiosks throughout each park. Each time I passed them I was amazed that there was rarely anyone using them...yet always a cast member nearby to assist.
Near ToT I had to make a change to one of our fastpass+ times and rather than use the kiosk the cast member there pulled up my info on his Ipad and made the change in under a minute. I believe a cast member will be happy to assist him quickly and efficiently. If he has a list of those fastpass+ he would like...he could make it his first stop after entering the park.
He may even find he likes this system better as he doesn't need to walk to each attraction individually.