I used the seat heater wiring as received, added a 7.5 amp breaker for each seat, and put the switches in the bulkheads along the right side of my F1 Rocket.
The only other change I made was to splice a quick disconnect connector near the aft bottom of the seats. This makes it a snap to remove the seat for vacuuming, barf cleanup (happened once), or whatever.
The wiring runs under the floorboards and half of the connector is a panel mount style that stays put in the floorboard.