I don't know quite what you're trying to install, but anchoring a kayak does not have to be involved or expensive. The amount of weight to hold a kayak is not much. I made my one system that works on lakes and moving water. I start with the anchor; I don't want an anchor that can snag, especially in moving water. So I made my own, I used an old12oz mug filled it with melted lead ( use a 20oz cup for concrete) and put an eye bolt in it to attach the anchor rope. Then install tie downs to the kayak to guide the anchor rope to the clam cleat, I can anchor both of the bow and stern. Attach the clam cleat to hold the anchor rope (1 for the bow anchor and 1 for the stern anchor), make sure you place the clam cleats where it will interfere with your paddle stroke. The tie downs should make as straight a line from the tip of the kayak (1 tie down at each tip) to the cam. I use ¼” para cord for the anchor rope and a carabineer to attach the rope to the anchor eyebolt. I will also glue a cushioning ring of foam on the anchor to protect the kayak from the anchor swinging.
http://www.nrs.com/product/2095/screw-mounted-tie-down-kit
http://www.westmarine.com/buy/clamcleat--clamcleats--P002_064_002_002
I hope this helps.