How to wire a jvc stereo in an opel kadett?

trying to wire up a jvc stereo in a 1977 opel kadett, which is the live wire?|||You need a test light to determine what wire's are hot. There should be two hot wire's. One is the switch hot. This is connected to the ignition switch. You need that so when you turn off the car the radio turn off also. The second one is the constant hot. This is needed to keep all your saved radio stations. Chances are that the constant hot and the switch hot will be red or yellow. You will need a ground wire also, most likely brown or black.