charcoal grill with smoker box attached

by A Smoker Cooking Enthusiast

I have a charcoal grill with a smoke box attached.
I have lost the directions and I don't know how to use the box attached to the grill. Do you put the wood chips in the box? Do you still need charcoal? Do wood chips provide enough heat to cook the meat? Do you add a pan of water? where should I put the pan of water?--in the grill or in the box?

I could sure use some help.

Thanks