On which terminal Gate B is located for parking my car at LAX CTA?

My friend will be arriving by China Southern Flight 327 on Jan 20.

The flight view iPhone App shows " Terminal-Gate" as B.

But when I checked the Parking Map on the LAWA website, I'm unable to figure out where is gate B?
All I can see over there's 8 terminals listed. (This is my first time finding parking structure, although
I have been to LAX before using Prime Time Shuttle before many times)

Question #1: Does anyone know which will be a best place for me to park
my car in one of the Parking Structures ( P-1, P-2, P-2A, P-3, P-4, P-5, P-6 or P-7).
I tried calling LAX number but their automated system was asking me to call the Airline staff,
which is closed now. I'm sure, experience of people here will much helpful for me as always.

Question #2: I have read lot of negative comments of the Central Terminal Area Parking lot on yelp, at LAX hence my another concern is, is it advisable to carry my friend with me to the parking lot
with all the luggage or should I ask my friend to wait at a specific area at the departure curb
and then exit the parking lot and then pick up? Please advise.

Question #3: Does these parking lot people accept Credit Card or only cash while exiting the lot?

China Southern uses the Tom Bradley International Terminal (TBIT), which is in between Terminals 3 and 4.

There are two ways you can pick up your friend:

1. Park in P-4 and meet your friend in the terminal. You will have to pay for parking, though.
2. Wait in the cell phone lot on Sepulveda Boulevard, wait for your friend to call you once he/she is ready at the curb, then drive up to the curb and pick up your friend. The cell phone lot is free.

Here is a map of the parking areas: . Note the bridge between P-4 and TBIT and the cell phone lot at 96th and Sepulveda.