Avid Juicy 5

I just bought a Cannondale Taurine with Avid Juicy 5's. The brake works fine but needs tightening of its grip on the rotor. The problem I have is the Avid lever doesn't have a dial on it for tension control unlike my previous brakes. It seems to have many screws on it and I'm sure one of these will do it, I just don't know which one. The bike didn't come with and Avid manual so I was hopeing someone might be able to help.I've been told by the shop that they are pre bled before shipping. Any suggestions would be apprevciated.
Cheers
Cheers
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all you can adjust is the lever reach. The pads will need to bed in. Up to 50 applications.
Parktools :?:SheldonBrown