Answer Try applying a spray called Bitter Apple, which is found at most pet stores, to the wires. This may deter him from chewing the wires, but you need to provide him with something else to chew.
Rabbits' front teeth grow throughout their lives and chewing helps prevent the teeth from getting too long. If they don't have anything to chew, their long teeth will eventually make it difficult for them to eat. Give your rabbit a piece of wood, such as a 2 x 4 or a chew toy for rabbits to help keep his teeth at a healthy length.