Manual Tranny Check

OK, I'm embarassed to ask this. I just finished changing the starter on my 240SX and while I was under the car I searched aroung for the bolt to check the manual tranny fluid. I only looked for a couple seconds, but I figured it would be hard to miss. Am I blind? Where is the bolt to check the tranny fluid? Thanks in advance. I'm sure if I look a little better I'll find it, but hey, gotta be lazy sometime.

driver side of the tranny, start where the gear box is and go up the side of the tranny and itll be sticking out. it looks like a square sticking out. and the drain plug is right under where the shifter is...