It says to pour it in:

"manifold vacuum line that will feed all cylinders, possible sources are P.C.V. valve or brake booster line"

The thing is I do not know where these three choices are. I left my Maxima Manual up in Northern Cali and I'm in Southern Cali for school. Could anyone help me with this? The other two oil and gas is a given. Just don't want to F-up my engine and put it in the wrong line. Thanks in advance.

 

I bet if you look in the first 8-10 pages of threads, you will find at least two of these threads (with pics) already going.
Just look a little.