Shouldn't be any different. If he is showing all the readiness signs, put him in underwear. Take him and have him try every 15 minutes and keep it up until he is consistently going and having no accidents. Then up it to 30 minutes. Do this until he is consistent. Repeat.
I don't see why it would be any different training him. IF his glucose level is under control. Is he showing signs of being ready? My girls liked to pee in the potty before bath time or after just waking up.