IMO, it would only be necessary if the one you have is defective in some way, in which case i would replace it.
BTW, on my '41 ford 6v positive ground car, i replaced all the battery wires, ground wires AND the one that runs from the solenoid to the starter with #00 wires from here and cleaned and removed any paint and corrosion from all connections :
https://www.ebay.com/itm/196129030249
cranks over as well as any of my modern 12v w/alternator cars. but a car with a generator (if that's what you've got) will always perform poorly at idle and the headlights will dim. might want to check the starter button ground too, as it grounds using the body of the button to the dash and can become corroded and loose too. at least it did on my car.
