TEN = Tacos El Norte.
I don't know which one is the habitual hangout of the Mazda Team - there's one in Gurnee, and one in Waukegan apparently. I'm guessing it's the Waukegan location, since Gurnee is teh urban sprawl.
If we're doing the Waukegan establishment, you will take I-94 south and then split off onto Rt 41 heading south (will be a ramp on your left). Then turn left (east) onto Grand Avenue. You will pass Green Bay Road, and according to MapQuest, TEN is right after/on Orchard Lane. If you hit Flossmor Avenue, you've gone too far.
If it's the Gurnee establishment, you will take I-94 south and get off at Rt 21. It'll be after you pass Great America on the left side. You will turn left onto Rt 21, heading northeast. According to MapQuest, it's just after you pass Washington Street. If you hit Grand Avenue (Rt 132), you've gone too far.