My LM 1000, square head (I'd imagine the round heads are the same) ran the supply to the coils directly through the kill switch as OEM.
That said what sort of switchgear are you using? The older round head swtichgear was........well pretty crap TBH.
The current taken by the coils is dependent on the coil resistance, lower the resistance, higher the current pulled.
Guzzis don't usually need low resistance coils, but you may run them as your bike is used for racing, so you could be pulling a higher current than usual.
Personally I'd run them through a relay, on my LM1000 which is only used on the road with a Sasche ignition, the kill switch opens the supply to the electronics which kills the ignition circuit.