Tachometer and accessory gauges light connections

[1964Superstock]

Looking for some advice on the best and easiest recommended location to tap into the light switch to power the tachometer light (not shift light) and lights for accessory water temp and oil pressure gauges. This is for a 1964 Plymouth Savoy/Belvedere. Your help is appreciated. Thanks!

 

[silversedan]

even if your car didn't come with a radio the plug in should be under there , the smaller orange wire is the dash light or radio lite, I'd hook it into there , that way it still fused.