The main requirements of the bait box are to keep humidity in and ants out. To allow termite entry, holes or slits should be cut into the base of the box where it rests on the soil or damaged wood. Cover the port with clear plastic on the outside, and a white piece of paper on the inside. This port allows you to see if termites are in the bait box without having to remove its lid. The termites will both consume and stain the white piece of paper.
Termites eat cellulose for food.
Cellolose is found in timber, cardboard and paper products. Termite food placed in the bait box should lack any artificial additives. Wood should be untreated and known to be highly susceptible to termites. Paper should lack printing inks and waxes. A proven method is to alternate layers of corrugated cardboard and thin strips of wood.