Enrique Salceda is the man Sarah, John, and the male Terminator visited in the movie Terminator 2: Judgment Day (1991) for supplies, guns, and a truck.
"Gnothi Seauton" is a transliteration of the Greek for "know thyself".
The address to the computer store was "1337" pronounced "leet" (substituting letters for similar looking numbers), hacker wannabe slang for "elite".
Enrique Salceda is killed in the novelization of Terminator 2.