What do you feed eastern box turtles?

I recently got an eastern box turtle. I found him in my ally. I usually dont take animals out of the wild but where i live, he wouldve gotten hurt. To many loose/stray dogs and cats everywhere and other threats. And also i live basically on a highway with alot of cars going through. I dont even know how he got here. Its amazing to me. I thought about taking him down to the river but its nothing but a big polluted mess. Its nasty. I've been taking care of reptiles for quite a while but never had a turtle. I usually only keep lizards. I've seen videos of these turtles eating lots of things but the only thing he seems to eat is waxworms and nightcrawlers so far. He won't eat any fruits and vegetables like i see in videos. I'm thinking it's just because hes from the wild. So what do you feed your eastern box turtles? And also. How many watts should a heat bulb for this turtle be? The one i have for him right now is a 50w with uva. I also have a uvb bulb for him as well>