Okay, those nuts. What Dean and Cory told you kind of explains why there is no torque specs. I bet teh characters next to them in kanji translate to "gutenteit" in German.
Just give them a push with your ratchet, don't try to crank on them super hard, and you'll be fine. If they did somehow start to back out, you'd hear a clunking from the front end only under acceleration and/or engine braking. It would be obvious what was causing it.