KM4OLT - Mike's Ham Home
I put this under Antenna as I consider it part of the antenna system. The antenna cable connects the antenna to the rest of the system. This is so that the antenna can be remotely mounted away from the radio.
As you reach more and more transmitted power the further away you want to be from the antenna anyway as the rf radiation has a damaging effect on human tissue. As with antenna types the cables are just about as wide based on it's intended use case.