Ditch Light Switch: Switch Power?

I'm going to install some ditch lights. I bought a Caliraised switch that can be wired different ways. I'm wanting the switch to illuminate when I turn on my parking lights so it illuminates the same as all the factory interior switches. What truck side wire(s) would I connect the switch wires to?

 

I used the headlight leveling switch harness to access both leads for the illumination circuit.

The light blue wire would be connected to RED closest to your BLACK wire on the ditch light switch. The BLACK wire from the ditch light switch is connected to the solid white wire to the headlight leveling switch...



This is only for the lighting up of your switch. The other two wires are for connecting your source and accessory(ies).

Best!