How to use a smoker. we have a char broil all in one smoker and grill, but can't find the user

Question

we have a char broil all in one smoker and grill, but can't find the user manuel........can you tell me how to smoke meat with this thing?I don't have a manual and when I tried to access char-broil's website the page I needded to access wasn't available.I am thinking of installing a propane or electric burner for use with a cast iron pan for smoker chips.