Need Hot Wire For Toggle Switch

[YZINGERR]

Ive got the dash apart and in need of a positive wire to tap into in order for me to plug an illuminated switch to.

The switch is for aux lights and requires a pos, ground, and relay connection... not sure what positive wire to use here.

If it makes any diff, i am installing the switch in the dash blank to the right of the heater control and left of the airbag disable key switch.

Maybe off of the radio?