right im fitting my new boost gauge in my car today and im having a bit of difficulty as my electrical screwdriver has broke so what ineed to know is what colour wire is the ignition and what one is 12v lighting out of brown & yellow, grey, red, brown&white, brown&black, and obviously brown is earth i know that im wiring it off the plug tah tgoes on the light switch indicator stalk

any help please as me dash is in bits lol