I will be arriving at PHX in a couple of days, to be met by someone I do not know. He is fairly unfamiliar with the airport (he is not a traveler), and will be driving his own car. He does not have a smartphone, and I'm not even sure he has a mobile phone of any kind.

I plan to email him a description of the clothes and backpack I'll be wearing. Where can I tell him to meet me at the PHX airport?

Are there numbered locations in the arriving-passengers pickup area? If so, what is a "good" number to tell him I'll be standing at/under/beside? (I'm flying Southwest with no checked luggage.)