[JayJay240sx]

aright so i have a boost gauge i hooked up already with the exception that i need to find a 12v interior power source to hook it up to, i want to hook it up to my light switch so when i turn my lights on the boost gauge face will also light up, im using the nitrous boost gauge its cheap and simple, my question is where do i tap into for the 12v power source for my gauges? i was told to look for the fuse for the lights and wire it into that and it should work but idk if this is true? also which if it is true would i have to tap into? i have a 92 s13 240sx with a red top sr, any help would be greatly apreciated