Reminder, any good LED light will not benefit from a relay harness.
Relays were great when dealing with a bulb that the output varies depending on input voltage. That would be a filament based light bulb (stock, Halogen, H4)
LEDs, at least any with a hint of good engineering behind them, have an LED driver. That is they will make the same light regardless of voltage. That is why you often see them listed as 9-36V. Doesn't matter what you feed them, the output is the same. Relays are another source of failure. IF your stock wiring is so sketchy that you need relays to run LEDs, you are going to have other issues with that poor of wiring. If you can run stock lights, you can run LEDs. If the high beam switch or headlight switch were scketchy before, they will still be after.
I have probably seen more relay failures than I have seen headlight switch failures. And when the lights in your sketchy wiring do fail (they will) now you have even more to try and diagnose on the side of the road/trail, in the dark.