You can spray the wires with bitter apple. You can block access to them if they are behind furniture. They sell plastic casing that you can bundle the wires into.
Maggie used to chew wires, then one day I realized she was actually chewing the labels on the wires and the wire was just collateral damage. This made sense because Maggie was always chewing cardboard, post it notes, etc. So I removed all the labels and she never bothered the wires again. So that may be happening with your cat as well.
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Holly, Misty & their friend, Jake, the dog.
Onyx, Callie May, Maggie & Kobi forever in my heart.
Yes, I know I need a new signature pic...someday...