On - Off - On switch to a switch panel

Okay, Im normally okay with wiring but this one has me stumped. Trying to wire an ON - OFF - ON switch from a diode dynamics harness to a switch panel. One on turns the lights main beam on, while the other allows my reverse lights to power the light whenever I go into reverse. My question is how I can translate this switch from a 3 way into an aux beam switch panel. Any help would be greatly appreciated yall!

 

it won't do on/off/on, a relay setup would be technically on/on. for that you'd need an SPDT relay like this

$10 Nilight 50003R Automotive Set 5-Pin 30/40A 12V SPDT with Interlocking Relay Socket and Wiring Harness-5 Pack, 2 Years Warranty

https://www.amazon.com/Nilight-Automotive-Harness-Interlocking-Socket/dp/B0748F1JK4

pin 86 would be connected to the positive output of the auxbeam panel,
pin 85 would be connected to a negative/ground. either the auxbeam, or grounded to the frame.
pin 30 is your device wire(common terminal on the switch)
pin 87a is the default non-powered state, typically this would be the reverse input-- meaning it would default to the reverse lights making the lights come on
pin 87 is the relay powered state, typically this is the switch-on/override mode. you can also jumper pin 85 to 87 for this.

if you require the entire on/off/on functionality, the circuit would need an additional switch or relay connected to interrupt the pin 30 output to make for the 'off' option.

 

Show the other end of the harness, that way we may see the setup. Also the rear of the switch (legend) for the terminal input /output.
P.S. Red wire (+) is "usually" in the middle. Ends are for each circuit, usually.