Secure the dock so you can create about 1-2 feet of slack (without tension) in the cable that you want to install the Dock Shock on. 

Mark the cable, near the anchor point, where you want to install the Dock Shock and again at 61 1/2 inches toward the dock. 

Ensure the Dock Shock and cable have a clear line of sight to the dock and do not contact obstructions that will cause wear or damage.

Starting at the cable mark closest to the anchor, place the cable in the Clamp V-groove at the first cable mark you put on the cable and tighten the 3 bolts (9/16 inch wrenches) to 15-20 foot-pounds of torque. 

Place the opposite end clamp at the mark 61 1/2 inches from the first mark. There should be approximately 8 inches of slack cable over the length of the Dock Shock. Again, tighten the second set of three 3/8 inch bolts to 15-20 foot pounds of torque. 

The Dock Shock is ready to use.  Repeat steps 1-5 above as you install Dock Shocks to other dock cables.

After installation of your Dock Shock(s), adjust your dock according to your normal procedures.