The CS injector is in the top of the intake manifold. There is a thin hard fuel line and a small electrical connector attached to it. You will need to get 2 new copper washers, be sure to get these before disconnecting the banjo fitting for the fuel line, or it may leak and you'll be stuck unable to run the engine until you get this fixed. There is also a paper gasket under the injector where it attaches to the manifold, sometimes this separates fine though.
You may be surprised to find the end of the injector totally encased in black goop when you pull it out. Hose it off well with carb cleaner, there is a test in the FSM for it. You may wanna try hooking it back up before re-installing, have a friend hold it inside a glass jar while you crank the engine to see if it squirts fuel.