The relay setup is eactly the same regardless of headlamp setup. One for low beam,and one for high beam. Fed from the battery,through a circuit breaker,through relays to lamps,with a good size wire. Keep wires as short as possible and solder and heatshrink all connections.
The only difference is how you trigger the relays. On the older models. You use the power coming from the headlamp switch to power the trigger side of the relay,and ground the other side. On a switched ground system,you power the trigger side of the relay from the battery,and use the ground from the headlamp switch to trigger it.
This takes all the load off the headlamp switch,and you can wire it to light both high and low beams together,when the highbeams are on.