Yah, all it has for "adjustment" is how to release the tension on the spring so it can be serviced (or if the rear axle housing has been removed). It talks about putting the lever down in the release position, getting under the car and pulling the cable about 1 to 2.5 inches and then up top inserting a steel pin into the lever housing to keep the spring from applying tension back on the cable.
If this isn't done, it's possible the spring can get screwed up, and then the whole thing needs to be removed to be fixed. It's possible this is why your parking brakes aren't working. When you pull up on the lever, is there any resistance or does it pull all the way up with little effort? If it's easy to pull up, and it goes all the way up with almost no effort, you probably lost the tension on your spring. If there is resistance when pulling it up, it probably means your cable has rusted/seized in the sheath (what happened to me).
Edit: So, to clarify, there is no "adjustment" for taking slack out or anything. If there's slack, it's because your cable is either broken or your spring has lost its tension. Again, this is from a 95 manual - yours might be different though I would doubt it.