Do you have to cut or splice any wires to install Yacht Controller?

NO. Yacht Controller installations integrate with your existing boats electrical control systems to retain the integrity and operation of the boats existing controls.Yacht Controller never cuts wires and is a full Plug and Play integration which does not cut or bypass your manufactures installed electronic system, so it is secure, safe and does not void any warranties.Other manufactures also claim this although you would be wise to actually check as some claims are untrue which can lead to your boats control being unsafe.