Fuel vent line location

Hey, newbie here. I’ve just purchased my first Z and my first car to work on (my daily will still be going to the mechanic for anything beyond basic maintenance lol). I am figuring most stuff out and I noticed that my charcoal canister is missing. Google searching indicates that it isn’t necessary as long as you put vacuum caps on the lines coming from the intake manifold/throttle body and run the vent line into the frame. My problem is that I have no idea where the vent line is located. Does anyone have a picture or easy to follow explanation?

Car: 1989 300zx NA