They’re custom cables that have to be made to order as they’re all different. Also I use silicone wires which have a high heat resistance and very flexible but any small cut can tear the coating. So it needs to be protected with a sleeve. Plus it’s easier to find your personal calbles on set when they’re color coded (steadicam operators usually come with their own custom power cables for their steadicam but then also use cables from the camera package. And I’ve lost cables when they get mistakenly returned to the rental houses.