Yup. The nut in the middle of the junction between the hand lever and the
two brake cables is the adjuster. Before you crank it up tight, do the step
of inspecting the rear brakes, and make sure the brake cables are routed
properly inside the brake... had this problem on my Van when I bought it.

>Also, how do I adjust the handbrake?  Do I just crawl underneath and
>adjust the bolt on the brake cable going back there?