[RichardJ]

The fnord relay is a poor choice.

A relay has two sections or circuits. The two circuits are only connected mechanically.
Headlights typically draw about 20 Amps combined with Hi and Low beams on. Quad headlights still draw roughly the same, because each of the four Hi filaments are smaller than in the dual headlamps.

Most Bosch relays can handle 30 Amps in the switch circuit. Using two Bosch relays to handle the slightly unequal 20 Amp split is no problem.
The fnord relay, if sold as a replacement Starter relay can handle 200 Amps or more. There are many sold with much lower ratings that were never intended to be used to power a engine starter motor.

The control side of the Bosch relay typically needs about 40 milliamps to control the mechanical aspect of the relay and close the relay switch contacts.
40 milliamps is 0.04 Amps.

A Fnord Starter relay can draw as much as 8 Amps on order to close the switch contacts. That's 16 Amps for two fnord relays in addition to the current the lights need. You might have to increase the size of the headlight fuse just to handle the extra load of the relay(s).