My 94 SSEi doesn't have a label under the maxi relay box either. I thought the douche that had it before I did, did something to it (they guy was an idiot that'* why I'm on here all the time). Anyways, I have a similiar problem. My solenoid engages but no starter turn or anything. I first thought it was the negative cable, I got another 1/8" turn out of it, and it worked. Then, 4 hours later, had to pick up my significant other, and it wouldn't start. So today, I turned the ignition on, crawled under the car and touched the starter wire post together with a wrench and Viola, it cranked over and started.
I'm guessing starter relay or ignition switch.